President Qin's Little Wife Is The Strongest - Chapter 7

The MC entered the body of the An family eldest son, An Ziran, an arrogant 16 years old boy who weighed 78 kg (~171-172 lbs), who only knew how to eat, play and sleep. Seeing his current body, An Ziran decided his first priority was to LOSE WEIGHT!

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

Corinne was never the princess, just her stand-in, sent to marry Alpha Barrett Locke and end a war.The crown was fake, the vows were lies, but the mate bond that snapped into place the night he marked her was brutally real. He knew she wasn’t the real bride. He claimed her anyway.When the true princess returned, he locked Corinne away to bury the scandal. She escaped carrying his child.Six years later, she returns, not as a decoy, but a self-made powerhouse with an empire of her own and a five-year-old son who has Barrett's eyes. She came for revenge.He sees his mate, his heir, and the bond that never died.This time, he’ll destroy anything to keep them both.One deception started the war between them. One child will finish it.

She gave up her dream of shining on the ballerina stage —for him.She sacrificed her self-respect —for him.She forgot her true identity —for him.But even after all that, she couldn’t compare to the woman who held Ryan’s heart.Arwen Quinn, heiress of prestigious Quinn family, realized too late that no matter what she did, she would never win Ryan’s love. The future that awaited her was a life trapped in endless misery of a loveless marriage.So, decisively, she ends their relationship and walks away. What she didn’t expect was that in breaking free from Ryan, she had opened the door for Aiden to enter her life — a chance that he had been waiting for.Aiden Winslow, an enigmatic CEO isn’t just mysterious —he is determined, and won’t allow to take Arwen away from him again.____Excerpt:Aiden narrowed his eyes, “Are you sure about this?”“If I wasn’t sure, I wouldn’t have asked,” Arwen replied coolly. “Stop dawdling. If you’re unwilling, I’ll find someone else who can get the marriage certificates today.”His expression darkened as he pulled her close. “Once offered to me, it’s mine alone.”Unfazed, Arwen asked, “So, do you accept? If yes, we’ll get the certificates now.”“On one condition,” he said. “I don’t do contract marriages. The woman I marry will be the woman I share my bed with. If you agree, then we’ll—”“Not a problem. Let’s go,” Arwen said without letting him finish, pulling him into the Civil Marriage Bureau.