The Return of the Su

In my previous life, I, Qin Lang, could only watch helplessly as Qin Chuan closed his eyes in pain on my father's deathbed. This lifetime, I, Qin Lang, will exhaust every effort to pull you back from the clutches of the King of Hell!,This world, son will definitely not let you leave again so easily!,"You, you dare call me a quack You dare question me I am the most authoritative expert doctor at Southwest University Affiliated Hospital, a doctoral supervisor, I..."。