贱人面前做个汉子爱人面前做回妹子
[jiàn rén miàn qián zuò gè hàn zi ài rén miàn qián zuò huí mèi zi]
It’s a bit complicated but essentially describes someone who pretends to be strong and stoic in front of others but acts sweet and gentle when alone with their lover. It reflects dual personality traits adapting according to circumstances.