 In spring 785, Li Huaiguang's subordinate Lü Mingyue () was killed by Li Huaiguang after he discovered that Lü had been in secret communications with Ma.Li Huaiguang also put two other subordinates, Gao Ying and Li Yong, under arrest for associating with Lü.Meanwhile, Ma rendezvoused with Hun at Changchun Palace and put it under siege.