Chen Jiongming
Sun Yat-sen proposed to forcibly unify China under centralized one-party rule, whereas Chen Jiongming opposed this idea, instead advocating for the establishment of a multi-party federal China through the implementation of inter-provincial autonomy. This split hit its apex when Li Yuanhong was reinstated as President of China, with Chen Jiongming declaring the success of the constitutional protection movement and calling for Sun Yat-sen to step down. When Sun refused, Chen organized a military revolt against the Guangzhou government, forcing Sun Yat-sen to flee once again to Shanghai. But Tang Jiyao eventually retook Guangzhou for the KMT, forcing Chen to flee himself, first to Huizhou then to Hong Kong. Sun Yat-sen himself returned to Guangzhou, where he re-established the military government.