The Most Powerful Heavenly Doctor

The bustling metropolis will actually be turbulent because of the appearance of one person. Six years ago, he left without a trace of dust; six years later, when he came back, the sky changed. He is the only order that the world's top organizations dare not accept; he is also the most inconspicuous person in the world; the three things he has done the most in his life are: killing people! Help! Cross people! Protagonist: He Sheng, Qin Jing