Traditional chinese craftsmanship for architecture and furniture 榫卯 sǔn mǎo 

The mortise and tenon technique does not use glues or nails and creates furniture that is usually very strong and durable. 

This is carpenter Grandpa Amu making a Luban stool out of a whole piece of wood using traditional chinese joinery technique 榫卯 sǔn mǎo.