心交朋友不交狗
[xīn jiāo péng yŏu bù jiāo gŏu]
Translates to 'Make friends with a sincere heart, not a dog.' This phrase implies treating people genuinely and expecting loyalty from true friendships, as opposed to superficial or disloyal relationships, like what might be seen in animals, specifically referring metaphorically here to insincere or exploitative individuals.