Saw teeth and claws
As a Chinese idiom, the Pinyin is j ù y á g ō UZH ǎ o, which means to refer to the ferocity and cruelty of human beings; it also refers to armed forces; it is the same as "hooking claws and sawing teeth". It comes from the ode to the south of the Yangtze River.
The origin of Idioms
Yu Xin's Ode to the south of the Yangtze River in the Northern Zhou Dynasty: "he saw his teeth and hooked his claws, and learned to flow along the river."
Idiom usage
It refers to the army.
Saw teeth and claws
strengthening the body resistance to eliminate pathogenic factors - fú zhèng qū xié