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
              
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                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')