四一二反革命政變 [－－－－－－－变]

Jyutping sei3 jat1 ji6 faan2 gaak3 ming6 zing3 bin3
Pinyin sì yī èr fǎn gé mìng zhèng biàn

Definitions (CC-CEDICT)

counterrevolutionary coup of 12th April 1927, Chiang Kai-shek's coup against the communists in Shanghai