不喜欢的女孩不要对她好不喜欢的男孩不要逗他笑
[bù xĭ huān de nǚ hái bù yào duì tā hăo bù xĭ huān de nán hái bù yào dòu tā xiào]
'Bu Xuan Shi De Nu Hai Bu Yao Duang Ta Hao Bu Xiang Shi De Nan Hai Bu Yao Dou Ta Xiao' translates into 'Don't be nice to girls you don't like; don't make boys who you don't fancy laugh.' It conveys a sentiment advocating honest feelings and clear actions, respecting others by avoiding leading them on with affection they do not feel.