Legend of Exorcism: Tianbao Fuyao Lu
天宝伏妖录 (Tianbao Fuyao Lu)
Fei Tian Ye Xiang
Half-yao Hongjun leaves the Taihang Mountains for Chang'an and joins a demon-hunting bureau run by Li Jinglong, a soldier without spiritual power.
See on Amazon →Trope: demon hunters
BL novels and comics tagged demon hunters.