船到江心，補漏遲 [－－－－－补－迟]

Jyutping syun4 dou3 gong1 sam1 , bou2 lau6 ci4
Pinyin chuán dào jiāng xīn , bǔ lòu chí

Definitions (CC-CEDICT)
  1. It's too late to plug the leak once ship is in the middle of the river. (idiom)