按强助弱

Explanation: Press: inhibition. Suppress violence, to help the weak 　　Usage: As a predicate, attribute, object; with "the strong and the weak" 　　Source: Spring Qi Guan Zhong, "Hegemony tubes": "to help the weak by strong, prince Yu violence only greed, survival be dangerous." Thesaurus:  crack down the rich and distribute their wealth among the poor