 Just four months later, however, the situation changed.Wang Sengbian's lieutenant Chen Baxian, displeased over Xiao Yuanming's ascension (as he saw Xiao Yuanming's claim as being too attenuated), make a surprise attack on Jiankang from his headquarters of Jingkou (京口, in modern Zhenjiang, Jiangsu), killing Wang Sengbian and forcing Xiao Yuanming to yield the throne to Xiao Fangzhi (who took the throne as Emperor Jing).Initially, Chen claimed that Liang would still agree to be a vassal, and Emperor Wenxuan sent the official Sima Gong (司馬恭) to swear an oath with Liang officials.