MTL - Chongfei Manual - Chapter 13

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

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

Despite having found Mingxi, the Zhao family continued to favor the fake daughter, saying that Mingxi was not as kind nor as graceful as Zhao Yuan.

Mingxi didn’t mind. She continued to work hard to please her family although they would always say that she was trying to rob their attention away from Zhao Yuan.

Until she died because of a terminal illness.

It was then that she realized that Zhao Yuan was the actual lady blessed by luck while she was merely this novel’s evil supporting character with a tragic ending.

Zhao Mingxi who was given a second chance at life was bitterly disappointed. She no longer cared about her family. Screw her family and her fiancé. She immediately packed her bags and left home, off to complete the task given by the system named ‘Becoming Friends With Fashionable and Valuable Characters’.

After she left, the house suddenly became cold and quiet.

By right they should feel at ease, but–

Her parents, her indifferent elder brother, her brash younger brother, Chen Liyao who was used to her pursuits were all successively feeling… unused to it?

This is the story of a modern sailor who was accidentally reborn as a soldier of the Brazilian Expeditionary Force, and finally became the largest plutocratic family in Brazil by virtue of his foresight.

- Description from novelbuddy