According to legend, during the Spring and Autumn Period, Lu's craftsman Lu Ban made a detachable toy out of six pieces of wood. In order to test his son's cleverness, he asked him to take it apart. After a busy night, his son finally took it apart. This kind of toy is called Luban lock by later generations, but it is actually just a legend. Lubansuo is also known as Kongmingsuo, Besapu, Liuzilian Boat, Mocher Pusi, Nanmu, etc. It originated from the velcro structure pioneered in ancient architecture in China.
Luban lock, without nails and ropes, is completely supported by the connection of its own structure, just like a piece of paper folded in half to stand up, showing a seemingly simple but extraordinary wisdom.