强颜欢笑

強顏歡笑
qiǎngyánhuānxiào
  1. to pretend to look happy
  2. to force oneself to smile

CEDICT

to put on a forced or strained smile

Wiktionary

勉强装出高兴、欢乐的样子。

重編國語辭典

Entry Composition

=1 强颜 qiǎngyán to reluctantly feign happiness; to assume a joyous mood reluctantly
=1 强颜 jiàngyán to have no sense of shame
2 欢笑 huānxiào
  1. to laugh happily
  2. a belly-laugh