xūn​yóu​yì​qì

good and bad cannot coexist

薰莸异器 薰蕕異器 xūn​yóu​yì​qì
good and bad cannot coexist
Literally "fragrant herbs and stinking weeds must be kept in different containers," meaning that good people and bad people cannot live together or be treated as the same.

Cross-References

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Antonym