真面目

rèn qīng mǒu rén zhēn miàn mù

认清某人真面目

know somebody's true self

bào lù zhēn miàn mù

暴露真面目

the true face is exposed

bù shí lú shān zhēn miàn mù zhǐ yuán shēn zài cǐ shān zhōng

不识庐山真面目，只缘身在此山中。

I see not the true face of Lushan mountain because I am in the mountain.

xiǎn lù zhēn miàn mù

显露真面目

unveil oneself

zhè ge gōng shāng yè jù tóu de zhēn miàn mù bèi jiē chuān le

这个工商业巨头的真面目被揭穿了。

The true face of the industrial and commercial giant was exposed.