please contact us by phone, qq, or email if any problems occur during the purchase of important facilities such as dams, rivers, reservoirs, etc, we will discuss with you all kinds of problems encountered during the shopping process. 2. if the goods can be received on time within one week, we will immediately inquire after receiving the customer's inquiry and give the customer the most timely reply to the corresponding questions. 3. if there is any damage during transportation, we will not bear any loss, but we can do our best to pack the products well and communicate with the freight to reduce the transportation loss. 4. we deliver the goods in a timely manner, and we will not bear the relevant responsibilities and compensation for the losses caused by the delivery delay of the freight company. shopping instructions due to camera shooting and computer display, there may be color difference between the real object and the picture. if you have any color requirements, please contact us in advance. otherwise, it is considered acceptable that there may be small color deviations. sorry for the inconvenience! due to the large fluctuation of raw materials and the vicious quotation competition of peers on the internet, the price of each of our products cannot be accurately displayed in front of customers, the price marked here is for reference only! contact and confirm!