 Li Weiyue refused, and Gu committed suicide.Subsequently, Tian sent his officer Meng You (孟祐), along with 5,000 soldiers, north to aid Li Weiyue in defense of Chengde, while he himself launched preemptive attacks on Zhaoyi Circuit (昭義, headquartered in Changzhi, Shanxi), then controlled by the imperial general Li Baozhen.By fall 781, however, Tian himself was suffering defeats at the hand of Ma Sui and Li Baozhen, such that he actually needed aid from both Li Weiyue and Li Zhengji's son and successor Li Na (Li Zhengji's having died by that time as well).