combat the weak with the strong
It's a Chinese idiom. Pinyin is y ǐ Du à NT ó Ulu ǎ n, which means to smash an egg with a grindstone. The metaphor is to attack the weak and win. From Sun Tzu Shi pian.
Notes on Idioms
Definition: Qiao, grindstone.
The origin of Idioms
Sun Tzu · Shi Pian: "the addition of soldiers, such as those who throw eggs by the bridge, is also virtual and real.
combat the weak with the strong
various difficulties and hardships - fēng shuāng yǔ xuě
It is a disgrace to let one's parents live in poverty in their old age. - píng qìng léi chǐ