覆水难收你懂吗木已成舟你知吗
[fù shuĭ nán shōu nĭ dŏng ma mù yĭ chéng zhōu nĭ zhī ma]
This phrase contains two ancient Chinese idioms - spilled water can't be put back, and what's done is done. It refers to irrevocable consequences or unchangeable circumstances, emphasizing irreversible events, urging others to accept what cannot be changed.