A water rocket is a toy designed to utilize the principles of mass ratio and atmospheric pressure, and it serves as a case study in physics education. It can foster students' interest in physics learning, and the underlying physical principles are crucial to understanding the fundamentals of mechanics in physics.
Water rockets, also known as air pressure-driven water rockets or water-propelled rockets, are made by using discarded beverage bottles to create the power chamber, the body, the nose, the tail fins, and the parachute.

KX1918 Water Rocket Head Kit (Medium Size)
KX1919 Water Rocket Head Kit (Large)
KX1920 -A Water Rocket Kit (Full Set)
KX1920-B Water Rocket Kit (Launching Stand with Air Pump)
KX1920-C Water Rocket Kit (Launch Frame)
KX1920-D Water Rocket Kit (Air Pump)
KX1920-KX805 Threaded Nozzle
KX1920-PJ8 Rocket Head Large Size
KX1920-PJ9 Rocket Head Medium

Rocket Head: Specification:
Large Rocket Head: 105*105*120mm Suitable for 1.25L and 1.5L Coca-Cola and Sprite bottles
Medium-sized rocket head: 75*75**110mm Suitable for 450ML and 600ML Coca-Cola bottles, Sprite bottles
Small rocket head: 25*25*67mm, suitable for pipes with a diameter of 2.05mm

Rocket Head: Specification:
Large Rocket Head: 105*105*120mm Suitable for 1.25L and 1.5L Coca-Cola and Sprite bottles
Medium-sized rocket head: 75*75**110mm Suitable for 450ML and 600ML Coca-Cola bottles, Sprite bottles
Small rocket head: 25*25*67mm, suitable for pipes with a diameter of 2.05mm

1. Streamlined design, reducing flight resistance while enhancing aesthetics.

2. Move the center of gravity of the water rocket forward to maintain the flight's balance and directionality, without needing to add additional weight;

3. Water rockets fall from high altitudes, greatly protecting the body.

Instructions: Fit the cover onto the bottle, and cut away any excess if necessary to fit the bottle size.

To reduce weight, use electrical tape to wrap and reinforce.

About bottles: Suitable for the mainstream carbonated soft drink bottles on the market, including: Pepsi (recommended), Coca-Cola, Sprite, Fanta, Mirinda, 7-Up, etc., but not for mineral water bottles.

Rocket Overview
Water rockets, also known as air pressure-driven water rockets or water-propelled rockets, are made from discarded beverage bottles to form the power chamber, body, nose, tail fins, and parachute. They are filled with three parts of water and then inflated with air from a pump to a certain pressure before launch. The water rockets use the mass ratio of water and air (the density of water is 771 times that of air) to compress air, which then rapidly ejects water from the nozzle at the rear of the rocket. This creates an opposite reaction, propelling the water rocket upward with rapid acceleration and inertial gliding, similar to a missile with a flight path. Once reaching a certain altitude, the rocket model opens its parachute to slowly descend back to Earth.

Water rockets are educational and entertaining, high in technology, and deeply loved by the vast majority of teenagers for their hands-on and brain-stimulating science education. It allows students to visually understand the launch, ascent, and recovery process of missiles and carrier rockets, the flight principles of missiles and airplanes, and their differences. It explains Newton's First, Second, and Third Laws (inertia, the law of conservation of energy, and action and reaction), and introduces some basic knowledge in areas such as aerodynamics and flight mechanics. It enables the vast majority of teenagers to understand space technology, to love space technology, and to cultivate, cultivate, and transport talents for the space industry. (National competitions have been held multiple times ~~)

2 Launch Principle

A bottle with a rubber stopper tightly fitted forms a sealed space. When air is pumped into the sealed container, the air pressure within the container increases. When the pressure exceeds the maximum adhesion between the bottle mouth and the rubber stopper, the mouth and the stopper detach freely, causing the water inside to shoot back and generate a reaction force to shoot out. The difference between water rockets and regular rockets lies in the fact that the propellant medium changes from hot air to water. Before launching a water rocket, air is pumped into it to a certain pressure. Since high-pressure air tends to flow to low-pressure areas, when the nozzle is opened, the air naturally flows towards the nozzle. However, the water in front blocks the air, so the water is pushed out of the rocket by the air, and the rocket also gains forward speed in the process.

3 Rocket Construction

Material Preparation

2 to 6 2.25L Coca-Cola bottles, scissors, single-sided blade, cork, ball-type air needle, ballpoint pen refill, stapler, double-sided tape, colored decorative paper, table cloth, and other lightweight and breathable materials.

Production Process

1. The production of the pressure plug: Use a knife to cut off the thicker end of the rubber stopper, with a cutting diameter of 2.3cm, and then pass through the small hole to install the air valve core, the rubber tube, and the screw cap. Then, push the rubber stopper into the bottle opening with force, making sure that the part exposed outside the bottle opening does not exceed about 2mm; use scissors to dig a hole with a diameter of about 12mm in the middle of the beverage bottle cap, so that when the cap is tightened, only the air valve core is exposed outside.

2. The production of the side wings: Cut out four side wings from hard paper. In order to ensure better stability during rocket flight, the side wings must have a higher hardness. If the paper is not hard enough, you can glue two or three pieces together to make them. After cutting the side wings, fold the "sticky claws" alternately on both sides and symmetrically paste them on the lower side of the rocket with transparent tape.

3. Remove one of the cola bottles and cut it into thirds with about a 1/3 gap. As shown in Figure 2, leave the neck and the middle section of the bottle. Turn the second cola bottle upside down. As shown in Figure 3, cover the bottom of the second cola bottle with the neck of the first bottle, and then cover the neck of the second bottle with the middle section of the first bottle. After covering, use double-sided tape to securely attach. Then find a hardboard and cut out the balance wings. The number of balance wings should be 4. Too large balance wings will be too heavy, and too small ones will not work for balancing.

4. Make a parachute by folding a square tablecloth along the edges, then folding it again in the middle. Cut off the excess to form a circle and secure the edges with thread. 1. Prepare the materials: 3-4 2.5-liter Jianlibao or Cola bottles, several X-ray films, several 3- and 4-inch soft rubber stoppers used in chemical equipment, a set of bicycle valve cores, scissors and a small knife, transparent tape, double-sided tape, and insulating tape, and a tube of 502 glue.

The second method of production: 1. Wing production. Cut the X-ray film into 28 identical right-angled trapezoidal pieces with a length of 12cm, a height of 6cm, and an angle of approximately 45 degrees between the oblique side and the long base. Cut another 4 pieces of the same specification, but with a height of 8cm, and short bases that are connected on both sides and overlap each other (used as the surface of the wings). Adhesive the 7 small trapezoidal pieces tightly to form a thick trapezoid, making it flat and straight, and then tightly wrap a large double-sided trapezoid to cover and adhere it. To make the thick surface of the wings flat, you can use scissors or a small knife to trim and straighten it, and then seal the thick surface of the wings with insulating glue. After that, fold the excess parts of the wings outward at a 90-degree angle. In this way, make the remaining X-ray films into three wings by the above method. 2. Body production. Take a Jianlibao bottle (the bottle head curve is quite natural, which is beneficial for reducing air resistance when making the rocket head), cut it horizontally at a distance of 11cm from the bottom, and adhere the part with the bottle mouth tightly to the bottom of another bottle with insulating glue, and wrap several layers of insulating glue around the interface to make it firm.Gas seal production. Take a 4th size soft rubber stopper, use a hole-opening tool to open a straight hole in the center of the bottom of the rubber stopper slightly smaller than the air valve core sleeve, and then use a small knife to cut off the fine end about 06cm; Put a larger area "ring" on the air valve core sleeve (available in hardware stores), and from the fine end of the soft rubber stopper, put the air valve core well, put on the same "ring", tighten the screw, slightly tight. Then, the gas seal is ground into a cylindrical shape with a grinder stone, so that it can just enter the cola bottle mouth or slightly tight, and then install the air valve core to use. 4th rocket head production. Take a 3rd size soft rubber stopper and sharpen it with a knife. 5th assembly of the wings. Take a Jianlibao bottle and cut a cylindrical body with two sides connected, which is slightly longer than the length of the wings, and then use transparent adhesive and insulation adhesive to adhere tightly the 4 wings in 4 equal parts. After that, the cylindrical body with the attached wings is fitted on the bottom of the water rocket to make it level with the mouth of the bottle (this is not necessarily the best position, and it can be adjusted up and down in the flight practice to determine). Use insulation adhesive to wrap and adhere tightly. 6thOtherwise. To increase the contact area between the stopper and the bottle mouth to increase the pressure inside the bottle, you can use a knife to sharpen the large end of the stopper slightly and make it rough and round. Since the rocket head has been extended by one section, the rocket head is lighter and unbalanced, and you can appropriately stuff paper inside to achieve balance. To minimize air resistance as much as possible, the cannon head made of soft rubber will be glued well to the bottle mouth of the rocket head with 502 glue. With these methods, a simple water rocket is completed. According to the water rocket we developed, through the improvement of practice, the horizontal flight can reach about 160 meters, and the vertical flight can reach about 4050 meters.

Water rocket launch method: 1. Water volume regulation. The amount of water in a water rocket and the gas-holding space of the rocket have a certain ratio, which cannot be too much or too little. The optimal water volume should be between 1/4 and 2/5 of the rocket's gas-holding space (for a 2.5 liter space, about 600 ml is recommended, and you can experiment several times to find the exact amount).

2. Launch angle. For horizontal flight, due to air resistance, the optimal angle for launch is between 50 and 55 degrees, which may vary for different water rockets. It can be determined through controlled variable experiments. (The optimal angle for our water rocket is approximately 53 degrees.) For vertical flight, the angle is 90 degrees.

3. Air plug usage. The principle of using an air plug is to adjust the tightness of the air plug by compressing the soft rubber plug to cause it to expand, with more compression leading to greater volume expansion and tighter air plugs, requiring a greater air pressure to push the air plug out, which means the rocket will gain more power. The specific usage is as follows: remove the air valve core from the air plug, insert the air plug into the bottle mouth of the rocket in its original shape, then use a wrench (a tool specifically used for screwing, available at hardware stores) to tighten the screws of the air plug, and then install the air valve core to inflate the air. (Note: The degree of tightening can be adjusted according to need.)

4. Stable Launch Control. Only the horizontal direction of launch is discussed. A launch pad is needed, which should be equipped with a navigation track. The navigation track should not be too long or too short; it is generally 60cm long (made by combining three large triangular teaching boards and two broom handles, using transparent adhesive to reduce friction between the broom handle and the water rocket). On calm days, aim directly at the target and launch at the optimal launch angle (the angle between the launch track and the ground). In windy weather, adjust the direction of the launch slightly from the target direction according to the wind strength and direction, and maintain the optimal launch angle.

5. Notes. Ensure that the rocket and the track are straight and aligned when launching. Any deviation of 1~2 degrees can affect the stability of flight and cause it to fly in an "8" shape. When using a pump to inflate the rocket, do it as smoothly as possible, and the frequency should not be too slow. Try to tighten the air seal as much as possible, which can be adjusted by tightening the screw of the air seal. The tighter the air seal is, the greater the pressure inside the bottle will be, and the greater the power of the rocket. Take a bottle and call it Bottle A. Draw a line at the 1-1 and 2-2 positions on the bottle, and the determination method for the two line positions is as follows. 1-1: Choose the position where the upper arc of the bottle is similar to the curvature of the rocket foam head. 2-2: Choose the lower part of the curve where the bottle turns straight, about 0.5cm below.

Cut (or cut) open approximately 0.5cm above the 1-1 line and below the 2-2 line with a craft knife (or scissors).

Trim the material slowly along the marked line with scissors, trying to make it as flat as possible so that it can fit tightly when connecting to the B bottle. Place the rocket foam head over the A bottle, and check from the top whether the foam head is aligned with the center of the bottle. If it is aligned, wrap electrical tape around the junction to secure it. Remove the cap from the B bottle, then tighten the nozzle onto the opening of the bottle. Connect the A and B bottles. Then roll them on a flat surface or the ground to check if the connection is flat and the rolling is smooth. If so, secure it with electrical tape. Take the third bottle, which we'll call the C bottle. Mark a line at position 33 and another at position 44 on the bottle. 33: Choose the lower side of the curve at the top of the bottle, about 05cm below. 44: Choose the lower side of the curve at the bottom of the bottle, about 05cm below. From the 33 line, about 05cm below, and from the 44 line, about 05cm below, mark a line.Cut (or cut) open at 5cm with a craft knife (scissors). Fold the thick paperboard in half, and then draw four trapezoidal shapes with a pencil. Then cut along the lines with scissors. Note: The size and shape of the tail fins can be varied to test their impact on flight. Similarly, create a presentation slide with the same size as the thick paperboard trapezoid. Cover the outside of the thick paperboard trapezoid with the presentation slide, first using double-sided tape to adhere the slide and the thick paperboard together, and then using electrical tape to cover the three sides. Adhere the folded part of the bottom with double-sided tape. This step is to attach the four tail fins to the C bottle. The completed picture of the four tail fins. Attach the four tail fins to the C bottle, ensuring they are cross-symmetrical to maintain balance. First, adhere the electrical tape to the sides of the tail fins, paying attention to the length of the electrical tape, which should be higher than the tail fin by about one tape height, and the bottom should be folded into the C bottle to increase the firmness. Then wrap the electrical tape around the top of the tail fins about two times. Connect the C bottle to the B bottle with electrical tape. Note: It is necessary to maintain the straightness of the water rocket body to ensure the accuracy of the flight direction.

Key Points

In the manufacturing process, the nozzle is very important, and the sealing must be good, otherwise it cannot provide good pressure. The air needle in the cork must also achieve watertight, and it can be used to pierce the hole with a hot needle tip. If there is still a leakage situation, you can add a ballpoint pen core to the air needle, and the tip of the ballpoint pen core extends above the water surface to prevent the rolling and leakage of air bubbles when inflating. The lines of the parachute must be firmly glued, otherwise, if the pressure is too large, it may cause the line to fall off from the parachute body. [1]"

4 World Records

The rocket, which is 830 meters high, was created by several students from the University of Cape Town. Its unusual shape resembles a chopstick when viewed from a distance. After multiple data collection and analysis calculations by a professional team, it was designed, with the exterior made from special materials. It differs significantly from traditional water rocket manufacturing processes and concepts.

5 Research Methods

The relationship between the vertical height of a water rocket and the level of water in the bottle.

The relationship between the vertical height of a water rocket and the level of water in the bottle can be obtained through experiments: Experiments have shown that when the amount of water is 13, the water rocket flies high. The experimental results show that the pressure is proportional to the range. This is because the greater the pressure, the greater the force of spraying water, the greater the impulse of the water rocket, and the water rocket performs reverse thrust motion. When the amount of water is more than 1000ml, the water in the water rocket is not sprayed completely, and it stops accelerating due to the decrease in pressure. Increasing the weight of the water rocket makes it fall early due to the influence of gravity. The larger the mass, the greater the momentum required. When the mass is constant, the greater the speed, the greater the momentum. To increase the speed, the method is to increase the amount of spraying water per unit time. Therefore, only when the pressure in the water rocket is appropriate to the amount of water, can it fly farther and higher. It was found in the experiment that if the amount of water is greater than the upper limit of spraying that can be achieved by a fixed pressure, the water in the water rocket will not be sprayed completely. How can we avoid the situation where the water is not sprayed completely? According to PV"nRT can be used to calculate the maximum amount of water that can be ejected under a certain atmospheric pressure. If the water quantity is not sufficient to be ejected to the maximum amount by the atmospheric pressure, it will be ejected earlier. According to theory, we first measure the maximum volume of water that can be filled into the water rocket, and then calculate the maximum amount of water that can be ejected under this atmospheric pressure. By using these two data to fill water and air, we can achieve the maximum range of the water rocket (PmaxFmax times Mmax).

How to Improve the Stability of a Water Rocket

During the ascent of a water rocket, it does not rise vertically, often tumbling or side-slipping as it rises. This requires us to improve its stability to ensure it rises vertically. To improve stability, we must consider the effects of air resistance. The top of the water rocket should be pointed to reduce air resistance; secondly, the shape of the bottle should be close to a streamliner to facilitate the passage of airflow; and to make it rise vertically, we also need to position it vertically when setting it up. We have used a triangular support to hold the water rocket upright (not tightly) to ensure it stands vertically.

The impact of the launch trajectory on the range

Fixed water volume 600ml, launch angle 50 degrees. Use the trackless launcher and 70cm launcher to launch water rockets and record the results and launch conditions. Compare the impact of the launch track on the flight distance. The experimental results show that the range of the trackless and track launchers is almost the same under the same impulse, indicating that the presence or absence of tracks does not affect the range. However, when the impulse is smaller, the trackless launcher is more likely to often deviate from the predetermined direction of the water rocket; while the track launcher has two supports, which makes it easier for the water column to be injected without producing other forces in other directions, thus enabling the water rocket to move straight ahead. Therefore, the track launcher is superior to the trackless launcher in accuracy.

The impact of the projectile weight on the launch trajectory

Fixed water volume of 600ml, launch angle of 50 degrees, using a track launcher. The projectile is placed in sequence with fillings, with a mass of 30g, 40g, 50g, and 60g. Compare the impact of the projectile weight on the trajectory of the water rocket launch.

It can be concluded from the experiment that the projectile without a front-filling material is significantly biased towards the rear due to the influence of the tail wing's mass. In this case, since the center of rotation for an object is considered to be its center of gravity, we can treat the center of gravity G as a pivot. Under the condition of only gravity, the projectile can be considered as a horizontal lever with G as the pivot. During flight, the projectile A and the projectile tail B will be subject to the same wind resistance, but due to the different lever arms (AG > AB), the torque generated at point A will be greater than that at point B, resulting in the water rocket's rotation affecting the flight path. Therefore, we must add a front-filling material to move the center of gravity G towards point A, making the lever arm AG equal to the lever arm BG (the midpoint of the water rocket), so that the torques generated at points A and B will be the same, achieving balance. However, if the front-filling material is added too much, the center of gravity will be biased towards the front, causing the lever arm AG to be longer, which will result in an imbalance.

The Impact of Launching Angle

Fix the water volume at 500ml, pre-fill the propellant, and use a track launcher. Test the impact of different launch inclinations (35°, 45°, 55°, 65°, 75°) on the distance of the water rocket launch.

The angle of the water rocket's launch is related to the oblique throw, so theoretically, when the launch angle is 45 degrees, the flight distance is long. However, the results of the launch show that when the launch angle is between 45 degrees and 55 degrees (approximately 52 degrees), a larger range can be achieved. When the launch angle is too small, the upward force of the water rocket is not large enough to enable significant climb, and the weight of the water rocket is pulled by the earth's gravity, making it easy to fall, resulting in a shorter range. When the angle is too large, although the upward force is large, the forward force is too small, leading to a short range, resulting in the situation of "flying high but not far". Therefore, in the aspect of the launch angle of the water rocket, it must consider the appropriate balance between the upward force and the forward force, the impact of various external factors, and the launch angle.

6 technology highlights

There are many types of water rockets, including single-stage single thrust (single-stage rocket, one nozzle), single-stage multi-thrust (single-stage rocket, multiple nozzles), and multi-stage multi-thrust (multi-stage rocket, multiple nozzles). There are rarely multi-stage single thrust. Since the single-stage multi-thrust is generally composed of nozzles "passively separated" and the body and nozzles are launched simultaneously, it is generally not considered a multi-stage water rocket. The multi-stage multi-thrust water rocket uses the "active separation" technology between the nozzles and the body, and the nozzles and the body are launched in succession. The technical fun points of water rocket production mainly include nozzle technology, active separation technology, and recovery technology.

The method of using bicycle inner tubes and valve caps as stoppers is popular in China, but due to the difficulty in controlling the launch time, it cannot perfectly achieve multiple launches. By using a pulley and a rope to pull the launch device's ring down, it achieves good control over the launch time.

In general, single-stage multi-push water rockets involve the thrust difference between the engine and the body. Since it is a 'passive separation' achieved by gravity, the thrust of the engine must be greater than that of the body to ensure that both have sufficient thrust when the rocket takes off and remain integrated. When the engine's thrust is exhausted, the body naturally separates due to gravity. The main body continues to fly. The advantage of this rocket is that it does not involve complex multi-stage separation technology, and it has a larger thrust, which makes it relatively simple to make. However, it is important to note that the diameter of the nozzle of the body should be smaller than that of the engine nozzle to achieve the thrust difference. Generally, the body uses parachute recovery technology.

Let's talk about the multi-stage multi-propulsion water rocket. This type of water rocket is large in size, and its height can even exceed 200 meters. The highest known launch height was achieved by water rocket enthusiasts on October 30, 2010, reaching 864 feet, approximately 263 meters. Although the launch height of this rocket is not very high, it is more challenging due to the "misaligned injection" technology, "active separation" technology, and the "staged recovery" technology of the body and the propulsion system, making it more favored by water rocket enthusiasts. The active separation technology in foreign countries varies, but the basic principle is consistent. By using the gravity at the time when the thrust of the propeller is exhausted and the spring force in the pre-embedded separator, as well as the thrust from the second stage of the rocket when the separation begins, it can quickly achieve the active separation of the first and second stages. When the propeller part enters the descent stage, it opens a parachute, and the second stage continues to rise until the thrust is exhausted and the second stage parachute opens. If there is a third stage, it will be pushed in turn.

Single-stage multi-thrust water rockets and multi-stage multi-thrust water rockets can both be quite large, but distinguishing between them is not difficult. You can tell them apart by looking at their appearance. Single-stage multi-thrust water rockets (which can be called pseudo-second stage) have the body and nozzle of the engine in one plane, as this is the only way to achieve simultaneous launch. However, for multi-stage multi-thrust water rockets, the nozzle of the second stage is always connected to the engine, as the second stage does not start working until the launch begins. Therefore, you can tell them apart by looking at the position of the nozzle.

7 Extended Production

1. After becoming familiar with the basic construction of water rockets, you can try to make larger and multi-stage water rockets. Use lighter metals to make them, and provide the air pressure using a pump.

2. The manufacture of a multi-stage rocket:

Tie several water rockets together and provide them with air pressure from a single air inlet. Meanwhile, spray water columns to enhance the flight capabilities of the water rockets.

After exploring, researching, and experimenting for more than half a semester, we have initially completed the development of the water rocket. We have made improvements in many aspects. Through the method of searching for information, we have a profound understanding of the history of rocket development, especially the history of rocket technology development in our country. We know that rockets are essential carriers for modern space exploration. Our country is the birthplace of rocket technology, but due to the shortage of funds and technical deficiencies, the development of the space industry has progressed slowly. However, with the strength of the comprehensive national strength, under the cooperation with foreign countries, we have launched many "Long March series" rockets.

2. Split one of the Bottega Veneta bottles into three parts; keep the neck and middle section.

3. For the remaining bottoms and midsections of the bottles, respectively, fit them onto the bottoms and mouths of another BOTTLENECK bottle, remember to apply the adhesive and fix them with insulating tape.

Note: The rocket's body must remain straight.

4. Use thick transparent film or pearl version to make four tail fins, and then evenly distribute and fix them on the fire
The latter half of the water rocket: Apply adhesive and securely fix with tape. Uneven distribution or non-fixation can affect the direction of the rocket's movement.

5. Put on the rocket head and nozzle, ready to take off and soar high!

6、Prepare for launch on the launch pad.

Zhejiang Jianyi Education Technology Co., Ltd.
Zhejiang Jianyi Education Technology Co., Ltd. (formerly Yifei Toy Factory)Established in 2007, the current brand is "XING TEACHER" and "JIAN YI". Over the past 10 years, our company has made unremitting efforts to make the enterprise gradually mature. Our company is a member of the Teaching Equipment Industry Association of the Ministry of Education, and is a leading enterprise in Zhejiang Province. The company has been awarded the "Heavy Contract and Credit-Keeping" unit for three consecutive years by Jinhua City. In 2014, it was awarded the "Advanced Collective of Jinhua Teaching Instrument Industry" by Zhejiang Province.
Zhejiang Jianyi Education Technology Co., Ltd. is a high-tech enterprise that integrates modern scientific research and development of educational equipment, curriculum design, teaching resource integration, and technical services. Zhejiang Jianyi Education Technology Co., Ltd., with high-tech products and modern educational equipment, has established itself in the education industry. Our products are sold all over the country and have been exported to Europe, America, Japan, and South Korea. After years of accumulation, the company has begun to take shape. In terms of technological innovation, the company has professional design personnel engaged in the research and development of complete sets of educational products and the upgrade of existing products; in production, management, and installation services, the company strictly implements the ISO9001 international quality assurance system standards; in marketing, the "Xing Teacher" products have been introduced into many provinces and cities in the country and enjoy a good reputation; for many years, it has provided high-quality, advanced, professional series of modern teaching equipment and professional equipment research and development custom services for the education industry. With excellent, high-quality professionals and perfect after-sales service quality, the company has established a good corporate image.Xing teacher's" series of science and education physics, chemistry, photovoltaic, wind energy, geography, biology, art, and so on, has successfully won bids in the education bureau tenders multiple times. Zhejiang Jianyi Education Technology Co., Ltd. continues to adhere to the business philosophy of "quality first, service to diligence, honesty in character," and upholds the "Xing teacher" culture, casts the "Xing teacher" brand, and creates the development policy of the "Xing teacher" career. We provide excellent equipment and high-quality services for school teaching and scientific research. We are willing to cooperate sincerely with new and old friends at home and abroad, work together, and devote our efforts to education and education.

  Before assembling, please check if the circuit is unblocked and all the components are complete. Ensure that all contact points are in good contact. During the assembly process, be careful not to get glue on your clothes or skin. Keep the parts out of reach of younger siblings to prevent them from swallowing them by mistake! Do not play with them on your head, to avoid the model falling and injuring you!