Meaning
kāigōngméiyǒuhuítóujiànkai1 gong1 mei2 you3 hui2 tou2 jian4
- lit. once you've shot the arrow, there's no getting it back (idiom)
- fig. once you started sth, there's no turning back
- to have to finish what one started
- to be determined to reach one's goals in spite of setbacks