After The Calamity - Chapter 15: I’ve Reached Arcen Awareness.

After waking up in the body of the Young Master of the Luo family, he finds he has the knowledge of hundreds of games and Light Novels. However, he finds his Dantian is crippled, so he can’t practice cultivation! Luckily, he has the Upgrade system.

[Of all the music I’ve ever heard, it’s your voice that calms my soul. He whispered]***Tang Xue Mei was the legitimate heir of the company, but her best friend caused her to lose her sight and her status. She was tortured every day until she ended her life. To her surprise, she was reborn three years before her death!Now, she isn't going to waste her second chance. With a new lease on life and the determination to change her fate, Xue Mei finds herself entangled with a man suffering from insomnia, who offers her power in exchange for her help in curing his sleep disorder.Feng Shihan, CEO of AG corporation, had everything from looks, fame and wealth, but he could never get a good night's sleep due to his rare severe sleeping disorder. Until he met Tang Xue Mei, he never thought he could get a decent sleep.But then he finds out that as long as she's on the bed with him, he could sleep as well as he liked. She was his miracle sleeping pill.Soon he finds out she’s difficult to get, so he proposes a form of alliance to her.“Miss Tang…if you agree to be with me, I’ll give you all the power you need…”In a desperate attempt to gain power and get back at those who had hurt her, she agreed to his request.

When he returned to the World of Martial Arts, the game was filled with blood and battles! Chen Kaixin had chased after the footsteps of the one emperor, two empresses, three princes, seven dukes, and thirteen aces for three years, but during the eve of the Sword Among Us tournament in Mount Hua, he was ambushed by evil bastards, and was killed so much that his level dropped to that of a newbie. He completely lost the chance to join the ranks of the powerful players in the game! In great disappointment, Kaixin quit the game and got drunk so that he could forget his sadness, but during that stormy night, Chen Kaixin found that he had actually dreamed for a total of three years, because when he woke up again, he woke up to three years ago, when he was still a student.

- Description from Novelupdates

“Young man… if you could go back in time, what period would you like to be in?”