别把感情玩太深别把玩笑开太真
[bié bă găn qíng wán tài shēn bié bă wán xiào kāi tài zhēn]
'Don't take feelings too seriously, don't play jokes too genuinely.' This expresses caution against becoming overly attached emotionally or being overly serious about humor. It advises maintaining a healthy distance in both affection and interactions.