 Gao Huan died in 547, and thereafter, Gao Cheng, who had already controlled many aspects of Eastern Wei imperial government's operations, took over as regent.He moved to consolidate his power further, and when Emperor Xiaojing of Eastern Wei tried to form a plot to kill him, he discovered the plot and put Emperor Xiaojing under effective house arrest.He then planned taking the throne himself, but at a meeting in 549 at the capital Yecheng (鄴城, in modern Handan, Hebei), with his officials Chen Yuankang (陳元康), Cui Jishu (崔季舒), and Yang Yin, to discuss the procedure for doing so, he was assassinated by his servant Lan Jing (蘭京), who was angry at his wrongful treatment.