唱紅臉 [－红脸]

Jyutping coeng3 hung4 lim5
Pinyin chàng hóng liǎn

Definitions (CC-CEDICT)
  1. to play the role of the hero (idiom)
  2. to play the good cop
Definitions (Wiktionary)
  1. verb, verb-object
    to play as the "good cop" in a good cop bad cop tactic; to pacify or appease while having one's partner threatening or punishing the same target
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 日常用語：臺
    扮白臉
  2. 日常用語：陸
    唱紅臉
  3. 差異說明
    大陸​稱為​「​唱紅臉​」​，​由於​京劇​中畫​紅臉​的​角色​多​是​忠臣​或​好人​，​故引​以​為​用​。