唱紅打黑 [－红－－]

Jyutping coeng3 hung4 daa2 hak1
Pinyin chàng hóng dǎ hēi

Definitions (Wiktionary)
  1. verb, Mainland-China
    to uphold communism (literally "sing red songs") and defeat the gangs (a campaign of Bo Xilai 1949–)