我怕人心太险恶我怕真心给错人
[wŏ pà rén xīn tài xiăn è wŏ pà zhēn xīn jĭ cuò rén]
Expresses a guarded heart after being hurt before. Being scared that people might not be honest or trustworthy makes the person worried about revealing sincere feelings to someone who doesn't deserve them.