疑人勿使，使人勿疑
yí​rén​wù​shǐ​shǐ​rén​wù​yí

don't use a person you suspect and don't suspect a person you use

  1. 疑 yí verb
    to doubt
    (bound form) to doubt; to suspect; to disbelieve
  2. 人 rén noun
    person
    person; people; human being; a human
  3. 勿 wù adverbverb
    do not
    Used in formal or written contexts to express prohibition or advice, similar to 不要 bù​yào or 别 bié.
  4. 使 shǐ verb
    to use
    To use; to employ; to apply; to make use of.
  5. ， shǐ
    non-Chinese
  6. 使 shǐ verb
    to use
    To use; to employ; to apply; to make use of.
  7. 人 rén noun
    person
    person; people; human being; a human
  8. 勿 wù adverbverb
    do not
    Used in formal or written contexts to express prohibition or advice, similar to 不要 bù​yào or 别 bié.
  9. 疑 yí verb
    to doubt
    (bound form) to doubt; to suspect; to disbelieve