His father Wu Chengbi (烏承比) was an army officer at Hedong Circuit (河東, headquartered in modern Taiyuan, Shanxi).
From Wu Chongyin's youth, he served as an officer at Zhaoyi Circuit (昭義, headquartered in modern Changzhi, Shanxi).
Once the campaign was underway, however, Lu was in secret communication with Wang and interfered with the progress of the imperial forces, commanded by the eunuch general Tutu Chengcui.
[3] Tutu put Wu temporarily in charge of the Zhaoyi forces, and Emperor Xianzong contemplated making Wu the military governor of Zhaoyi, before, at Li Jiang's advice, he shifted Wu to Heyang Circuit (河陽, headquartered in modern Jiaozuo, Henan) while making Heyang's military governor Meng Yuanyang (孟元陽) the military governor of Zhaoyi.
[6] Once Wu took over at Henghai, he became convinced the reason why so many warlords rose north of the Yellow River and resisted imperial authorities was because of the great powers the military governors wielded.
[2][5][9] Subsequently, Wu was made the military governor of Tianping Circuit (天平, headquartered in modern Tai'an, Shandong).
[10] He was given posthumous honors, and it was said that more than 20 officers, missing him bitterly, cut off flesh from their thighs and burned them as offering to him.