Yabla video uses of 叹为观止

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.
ràng
叹为观止 tànwéiguānzhǐ
a
Láng
教授 jiàoshòu
This will amaze you, Professor Lang.