天会黑人会变三分情七分骗
[tiān huì hēi rén huì biàn sān fēn qíng qī fēn piàn]
'The Sky Can Turn Dark and People Change; Three Parts Truth, Seven Parts Lies.' This saying acknowledges human unpredictability and emphasizes caution in trusting others. It cautions about the complexity of relationships and how people might hide their true intentions.