About pins, there is a little story: once, our country held a research and creation conference. At the meeting, the Japanese creationists entered the rostrum, took out a curved needle and asked a question. He asked, & other; How many USES are these paper clips? Throughout the &; A Chinese scholar present at the time said there were more than 30 kinds. Mr. Murakami proved himself to have more than 300. Everyone gave him a big hand. Then someone in the audience handed me a note. The note said, \"tomorrow I'm going to make an argument that these paper clips have a million USES. This man is xu guotai. The plan he came up with became known asMagic ball phenomenon. According to his argument, paper clips can be made into various weights due to the same weight; As a metal, paper clips can react with acids and other chemicals in an unknown number of ways. Paper clips can be 1, 2, 3, 4, 5, 6, 7, 8, 9, plus, minus, multiply and divide; Can become English, Latin, Russian letters, so that all languages in the world can express things, paper clips can express. In addition, the paper clip is a metal can also conduct electricity, there is a magnetic reaction in the magnetic field; In art, when stretched, it ACTS as a string. It can also make clips, ropes, chains and necklaces. & hellip;