来者不善，善者不来
lái​zhě​bù​shàn​shàn​zhě​bù​lái

he who comes is surely ill-intentioned

来者不善，善者不来 來者不善，善者不來 lái​zhě​bù​shàn​shàn​zhě​bù​lái
he who comes is surely ill-intentioned
he who comes is surely ill-intentioned, and no one well-meaning will come; used to warn that a visitor likely has ulterior motives or is bringing trouble