Янь Сишань
Zhang Zuolin controlled the Beiyang Government until June 1928 when the Nationalists on the Northern Expedition led by Chiang Kai-shek and allies Yan Xishan and Feng Yuxiang jointly advanced on Beijing. Zhang left the city for Manchuria and was assassinated en route by the Japanese Kwantung Army. Beijing was handed over peacefully to the victorious Nationalists who moved the capital and Sun Yat-sen's tomb to Nanjing. For the first time since 1421, Beijing was renamed Beiping 北平 (Wade–Giles: Peip'ing), or "Northern Peace". Following the Northern Expedition, Beijing was under the "de facto" control of Shanxi warlord Yan Xishan who had allied himself with Nationalists. On 2 March 1929, the city was the place of a violent mutiny of soldiers who formerly belonged to the army of warlord Zhang Zongchang, a subordinate of Zhang Zuolin. Though the mutineers managed to seize the Yonghe Temple and spread terror in Beijing, their revolt was quickly suppressed. The city was made the provincial capital of Hebei Province, but lost that status to Tianjin in 1930. During the Central Plains War in 1930, Yan Xishan briefly tried to establish a rival national government in Beijing but lost the city to Zhang Xueliang, the son of Zhang Zuolin who was allied with Chiang Kai-shek.