他已走别回头
[tā yĭ zŏu bié huí tóu]
'他已走别回头' translates to 'he's already gone; don't look back'. The owner seems to have experienced departure - whether literally a physical goodbye or figuratively the leaving of something important. It implies moving on and avoiding regretting looks or actions, urging people to let go of things that can't be turned back to, accepting what has already happened.