Doctor's Rebirth - Chapter 1: The Main Character

Every time he dies, Ethan Hill gains a little more power.Earth was chosen for Integration, but Ethan knows from the second his Trial begins that the Integration is a lie. These creatures giving Earth the 'honor' of access to their Interface want something from Earth - he just doesn't know what.Now he's trapped on an alien planet and lost in a time loop, fighting for strength and for his own humanity.One thing's for sure: He'll die as many times as it takes to tear it all down.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

From the end of the world to the ancient times, before Gu Yundong could breathe a sigh of relief, he found that he was on the way to escape from the famine.

And their family was being kicked out by their grandparents from the fleeing family team, and everyone else was watching from the sidelines.

The father is missing, the mother is stupid, the little radish-headed brother and sister have bony heads and huge heads, and the dying Gu Yundong only feels a toothache.

No way, just roll up your sleeves and do it.

Doing business, opening shops, and buying fertile farmland, Gu Yundong’s life is going well. If there is no one around who is staring at her and wants to marry her back home, she can go to heaven.

Ye Huai has two goals in his lifetime: to be a good doctor, and also to be a good doctor who is surrounded by handsome men.

Unfortunately, after being a doctor for 10 years, he lost his job because of a very handsome man.

What should he do?

520: Congratulations! You have been successfully bound to system number 520. The Save the World Task Set is coming soon……

Ye Huai: ? ? ? ! ! !

So, today Doctor Ye is busy saving the world……

520: Lies! You are clearly trying to pick up guys!

Ye Huai: No, I am very dedicated to fulfilling the great ambition of saving the world.

Narcissistic and Complex Shou X King of the Silver Screen Gong, along with the newborn system number 520 whose three views are crumbling and reestablishing every day.

- Description from Novelupdates