你既然要走何必回头
[nĭ jì rán yào zŏu hé bì huí tóu]
This translates as 'If you've chosen to leave, why bother turning back'. It conveys a resigned feeling, accepting a decision someone has made even if it causes pain, emphasizing a sense of letting go rather than holding on. This can represent a farewell or parting note in relationships.