Northeast Flag Replacement

The Beiyang government's five-coloured flag
Flag of the Nationalist government

The Northeast Flag Replacement (traditional Chinese: 東北易幟; simplified Chinese: 东北易帜; pinyin: Dōngběi Yìzhì) refers to Zhang Xueliang's announcement on 29 December 1928 that all banners of the Beiyang government in Manchuria would be replaced with the flag of the Nationalist government, thus nominally uniting China under one government.