小三脸上挂着五指山
[xiăo sān liăn shàng guà zhe wŭ zhĭ shān]
Literally, this means 'third party' (often used to describe a mistress or homewrecker) with a hand-shaped mountain on her face, symbolizing the heavy consequences and pressure she bears due to the inappropriate relationship, likely to criticize such a role in society.