The Tianjing Incident (天京事變) occurred during the late Qing Dynasty from September 2 to October 1856. This was a major internal conflict within the Taiping Heavenly Kingdom which took place in its capital city Tianjing. A few key leaders of the Taiping Rebellion were killed; the East King Yang Xiuqing, the North King Wei Changhui and the Yan King Qin Rigang. More than 27,000 other civilians and troops perished in the conflict as well. The Tianjing Incident was said to be one of the factors which led to the eventual failure of the Taiping Rebellion, as well as the turning point in its fate.
In 1851, the Taiping Rebellion's leader Hong Xiuquan conferred the title of 'King' on five of his most loyal followers and placed them under the jurisdiction of the East King Yang Xiuqing. After the deaths of the South King Feng Yunshan and the West King Xiao Chaogui, most of the power of the Taiping Heavenly Kingdom fell into the hands of Yang Xiuqing.
In the early years of the Taiping Rebellion, the real power of the military was in the hands of the Military Advisor (軍師) and the leader Heavenly King Hong Xiuquan did not actually wield any power in his hands and was merely a puppet leader. The real power of the military was actually in the hands of the East King Yang Xiuqing, who gained more power following the deaths of the South and West Kings. Hong Xiuquan declared in 1848 that the spirit of the 'Holy Father' (天父) would possess Yang Xiuqing and give him orders through Yang. This had allowed Yang to become even more influential and placed him in a position higher than Hong, as Yang often gave orders to Hong, who was supposed to be his superior, in the name of the 'Holy Father'. When this happened, Hong had no choice but to follow the orders of the 'Holy Father', which were actually Yang's orders.
After the Taiping Army captured Nanjing and established its capital city there, renaming it to Tianjing, Yang Xiuqing's relationships with the other Kings gradually worsened. The North King Wei Changhui was flogged on Yang Xiuqing's orders once, as his subordinate had offended Yang. Later, Wei's relative had a dispute over property with Yang's relative, which angered Yang. Yang Xiuqing called Wei Changhui to decide the punishment for Wei's relative together, and Wei replied that his relative should be torn into five parts. Once, the Yi King Shi Dakai's father-in-law Huang Yukun offended Yang Xiuqing and was ordered to be flogged 300 times, and his nobility title removed and demoted. In the same incident, the Yan Prince Qin Rigang and another high-ranking official Chen Chengrong were also flogged on Yang Xiuqing's orders. Even the Heavenly King was not spared from being flogged, as Yang often pretended that the 'Holy Father' had possessed him and used the name of the 'Holy Father' to punish Hong Xiuquan. Yang Xiuqing monopolised the power of the kingdom and became increasingly influential, making him feared and hated by the others, but none dared to oppose him.