That's Mr. Su from "The Record of Ten Thousand Demons"

In the prosperous age of Great Jing, evil spirits were rampant and the people were displaced. Su Qinghan, dressed in white, took charge of the Demon Suppression Department at the age of twenty-five. In five years, he had killed all the evil spirits in the world and protected the entire world. Emperors relied on her, Taoists bowed their heads, and all the people knelt down to worship her. Everyone praised her as the saint who banished immortals and the light of heaven in the world. She is gentle, just, compassionate, never kills innocent people, and is the purest righteous person in the world. But no one knows—— Her eyes hide the eternal desolation, and her body contains the origin of all monsters. The demons that the world fears, the evils that hate, and the evil spirits that people kill are all her heirs. She entered the world to slay demons, never to protect humanity. He just cleans up the monsters and rivers and mountains that have caused chaos in his own family.