好朋友只交心不交易
[hăo péng yŏu zhĭ jiāo xīn bù jiāo yì]
It states 'Good friends share hearts but do not engage in exchanges or transactions’. Highlighting pure, sincere bonds formed solely based on mutual affection without expectations for any return favors or material benefits from friendship ties; this kind of connection represents deep-level trust where only soul meets soul freely beyond interest considerations.