1 sentence for 人后 (rén​hòu — behind people's backs)

1. 他是个典型的两面派，在人前一套，人后一套。

   tā shì gè diǎn​xíng de liǎng​miàn​pài, zài rén​qián yī tào, rén​hòu yī tào.

   He is a typical double-dealer, saying one thing to people's faces and another behind their backs.

   Source: Dong Chinese Dictionary