ที่มาจากเรื่องราวประวัติศาสตร์

to go on foot (idiom)/to do things at a leisurely pace

lit. secretly crossing the Wei River 渭河[Wei4 He2] at Chencang (idiom, refers to a stratagem used by Liu Bang 劉邦|刘邦[Liu2 Bang1] in 206 BC against Xiang Yu 項羽|项羽[Xiang4 Yu3] of Chu)/fig. to feign one thing while doing another/to cheat under cover of a diversion

lit. looking for a fine horse using only a picture (idiom)/fig. to do things along rigid, conventional lines/to try and find sth with the help of a clue

lit. the snow piles up at Cheng Yi's door (idiom)/fig. deep reverence for one's master

to display one's slight skill before an expert (idiom)

there can never be too much deception in war/in war nothing is too deceitful/all's fair in war