好马不吃回头草

1. • lit. a good horse doesn't turn around and graze the same patch again (idiom)
2. • fig. once you've moved on, don't go back again (romantic relationship, job etc)
3. • leave the past behind

Character by character

• 好(hǎo)good
• 马(mǎ)surname Ma
• 不(bù)no
• 吃(chī)eat
• 回(huí)Hui ethnic group
• 头(tóu)head
• 草(cǎo)grass