交友须谨慎。

You must be careful in choosing your friends.

Source: Tatoeba

Sentence Composition

1 交友 jiāoyǒu to make friends
=2 须 xū
  1. must
  2. to have to
  3. to wait
=2 须 xū
  1. beard
  2. mustache
  3. feeler (of an insect etc)
  4. tassel
3 谨慎 jǐnshèn
  1. cautious
  2. prudent