ㄊㄨˋ˙tùziㄅㄨˋchīㄨㄛㄅㄧㄢㄘㄠˇwōbiāncǎo

兔子不吃窝边草
  1. 兔子自己保護自己發現比喻危害鄰里侵犯周遭利益 兔子不吃窩邊草不會無知汙染產業自家附近」。

A rabbit doesn't eat the grass by its own burrow (idiom)​; One shouldn't do anything to harm one's neighbors.
Es sägt niemand gern den Ast ab, auf dem er sitzt.