 In 272, during the reign of the last Wu emperor Sun Hao, Bu Chan was recalled back to the imperial capital to serve as the Controller of the Imperial Guards ().As Bu Chan and his family had been living in Xiling for several years, he thought that he was being recalled because he failed to perform his duty well in Xiling.He also feared that he would become a victim of slander and end up in deep trouble, so he defected to the Jin dynasty and surrendered Xiling to the enemy.