sentences:  In winter 547, the plot was discovered, and Gao Cheng put the emperor under arrest and executed his coconspirators.Late in 547, Murong Shaozong crushed Xiao Yuanming's army at Hanshan (寒山, in modern Xuzhou, Jiangsu), capturing Xiao Yuanming.When Xiao Yuanming was delivered to Gao Cheng, Gao Cheng treatedly him with respect, intending to try to use Xiao Yuanming as a pawn against Hou.