The Ruler Of Darkness - Chapter 13Book 2:

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

Lu Mingshu had never believed in fate.

When Peter is transported to a brutal system-driven world, where stats, skills, and paths to power are granted upon turning eighteen... He gets nothing.Thrown into a military training regime where the weak are discarded and the strong survive, Peter should have been erased.Alongside Thea, a fierce warrior, and Elric a determined healer, Peter claws his way forward. Creating and rediscovering the secrets of Cultivation and World Force.But as he defies the rules of the world, the world starts to notice.

Shen Yubai from the international class is a wealthy young master, enormously powerful and notoriously difficult to deal with, haughty and proud. The transfer student, Shen Sinian, is fresh and handsome, sunny and cheerful, with a mysterious background, almost mythical.Xu Chuning from the regular class and her mother rely on each other, living a meager life, attending school with the aid of scholarships. She should have nothing to do with either Shen Yubai or Shen Sinian.However, recently, schoolmates have noticed that she and the transfer student Shen Sinian are unusually close, their interaction ambiguous. Shen Sinian seems to do everything she says, whereas Shen Yubai from the international class shows special attentiveness towards her.One day, schoolmates even overheard Shen Yubai cornering Xu Chuning, asking her in a deep voice, “Who is better, me or Shen Sinian?”Classmates: “?”Is this some kind of love triangle showdown?