chapotraphouse

They were an anti-Chiang faction that split during the late civil war and declared support for the CPC. They still exist on the mainland until this day.

There was also the left-right split before the war with Japan; after Sun Yatsen's death there were rival KMT governments with the rightists led by Chiang in Nanjing and a leftist government in Wuhan led by Wang Jingwei, though the latter folded and the party reunited until Wang became a traitor during the war and sided with Japan.