yī gè rén shì fǒu chéng gōng / wǎng wǎng yào děng dào gài guān lùn dìng cái néng xià jié lùn

一个人是否成功，往往要等到盖棺论定才能下结论。

Whether a person is successful often cannot be concluded until the lid is on the coffin.