Ancient people invented a what bolts is composed of three wood

This is Lu Ban locks, also known as Kongming locks, folk legend has it that during the Three Kingdoms period Zhuge Kongming according to Lu Ban's invention, combined with the principle of gossip metaphysics invented a toy that has been widely circulated in the folk. Is a traditional ancient Chinese civil engineering construction fixed combination of devices, folk and "don't boring stick" "six joint side" "Monet" "difficult to people wooden "and other names. No nails and ropes, relying entirely on its own structure of the connection support, like a piece of paper folded to be able to stand up, showing a seemingly simple, but condensed extraordinary wisdom. Kongming lock, also known as gossip lock, Lu Ban lock. Expo China Pavilion is composed of him.