Hou Jing
In 548, the rebel general Hou Jing rose against Emperor Wu and by 549 had captured the capital Jiankang, taking Emperor Wu and his crown prince Xiao Gang (the eventual Emperor Jianwen) hostage. In winter 549, the ambitious general Chen Baxian raised an army at Guang Province (廣州, roughly modern Guangdong) and planned to march north, eventually to head to Jiankang to attack Hou. His path, however, was blocked by Cai, who then controlled Nankang as a local warlord. Xiao served in Cai's forces and fought so fiercely that none of Chen's soldiers was a match for him, but eventually Cai was defeated, and Xiao surrendered. Xiao became a subordinate of Chen's commander Hou Andu. He was part of Chen's campaign, as Chen joined with Wang Sengbian, the chief general of Xiao Yi the Prince of Xiangdong (the eventual Emperor Yuan), to destroy Hou Jing.