以碫投卵 yǐ duàn tóu luǎn

yǐ duàn tóu luǎn set phrase to use a grindstone against an egg
Domain: Idiom 成语
Notes: An analogy for the strong to dominate the weak; for example, in the Warring States period text 孫子兵法 “Art of War” by Sunzi, section 5 (reworded from tr. by Giles 1910, p. 35; Guoyu '以碫投卵')