逢场作戏比的是精湛演技
[féng chăng zuò xì bĭ de shì jīng zhàn yăn jì]
'Feng chang zuo xi bi de shi jinzhui yanyi', meaning 'Impromptu acting comparing skillful performance'. The idiom 'Feng Chang Zuo Xi' originally referred to engaging in casual encounters or temporary affairs. But here it points out that everyone is putting up some act when they're together, competing against one another to put on the most authentic or moving facade.