ròu​tǎn

to bare one's upper body

肉袒 ròu​tǎn
to bare one's upper body
to take off one's upper garments and expose the back or shoulder, performed in ancient times as a sign of respect, submission, or contrition
to apologize or surrender
to offer a humble apology or submit to a victor, reflecting the ancient practice of baring one's upper body to ask for punishment or show submission