Wang Songpu, a 47-year-old carpenter in NE China’s Tonghe county, can make more than 100 different kinds of Luban lock. Luban lock is also known as Kongming lock, a traditional Chinese folk educational toy. (Tian Xuefei and Zhou Huiying/China Daily) | China Daily

9.2K views · 62 reactions | A traditional Chinese puzzle made of beautifully fitted interlocking wooden pieces — known as a Luban lock — is easy to take apart but challenging to reassemble. In #Tengzhou, Shandong province, the birthplace of Lu Ban, visitors can feel the wisdom embodied in the ancient craft and experience the fusion of tradition and innovation. #culture #Lubanlock | China Daily | Facebook

What is the "Luban lock"?