xūn​yóu​bù​tóng​qì

good and bad people do not mix

Senses

薰莸不同器/ 薰蕕不同器 xūn​yóu​bù​tóng​qì good and bad people do not mix

Literally "fragrant herbs and foul herbs are not stored in the same vessel"; an idiom meaning that good and bad people cannot coexist or should be kept apart.

References

same_as 薰莸异器/薰蕕異器 薰莸不同器/薰蕕不同器