四一二 Traditional form: 四一二 Pinyin (reading): sìyī'èr Definitions: 12th April refers to Chiang Kai-shek's coup of 12th April 1927 against the communists in Shanghai Characters: 四 - four 一 - one; a, an; alone 二 - two; twice Traditional characters: 四 - four 一 - one; a, an; alone 二 - two; twice