Yabla video uses of

sǔn
mǎo
打磨 dǎmó
雕花 diāohuā
děng
传统 chuántǒng
木工 mùgōng
环节 huánjié
Mortise and tenon, sanding, carving and other traditional woodworking processes,
叹为观止 tànwéiguānzhǐ
de
智慧 zhìhuì
创造 chuàngzào
chū
le
sǔn
mǎo
and amazing wisdom to devise the mortise and tenon technique.