It's Not Easy to Be a Man After Travelling to the Future (WN) - Chapter 1454: Selfish Person.

Zheng Tan somehow returns to the year 2003, turning into a black cat. Picked up from a rubbish heap by the Jiao family, he is given the name “Charcoal”, and so begins the life inside Professor Jiao’s family. Zheng Tan remembers that he was once a person, but currently his body is that of a cat. He has no way of speaking the human language, but can understand it, and even retains the thinking and IQ of a young 20 year old youth. Read along as he adapts to this new world, and somehow tumbles from a group brawl to catching a thief.

- Description from Novelupdates

A high school student that has lived as a mob-character ―― Mimori Touka

Longevity Celestial Dynasty, Nine Years of Destiny.

China is in chaos, and the people are struggling to live.

The imperial rule collapsed, and the Western barbarians attacked with the religion of the gods.

The new warlords are everywhere, and they are divided into one side.

Natural disasters such as floods and droughts, the overturning of the earth dragon, the sandstorm tornado, the acid rain, the red moon, and the falling of meteorites have come one after another.

There are also countless monsters running rampant, strange clusters, ghosts and ghosts, indescribable monsters, or mysterious phenomena that cannot be understood.

In this dark and chaotic world, Tao Qian opened his eyes and found himself a prisoner who was about to be beheaded in Caishikou…!

- Description from novelbuddy

What people do, heaven sees. Evil-doers will receive punishment. But there is always someone who thought that because they have the protagonist halo, they could do whatever and bully whomever all they want without any consequences. Then, let’s just remove their halo and tear down their mask of hypocrisy. Let those scum men and goody two-shoes experience “putting yourself in other’s shoes”, so they would know they were at fault.

At first, Lu Jingqian thought he had to sacrifice his body in order to complete the task. But there are three benefits in doing so; having great items, living a good life, and having a high face value. After a long while, he also felt quite good… what to do?

System, “Can you be more modest? Please remember when you first rejected the idea, what about those just and upright words you said before?”

Lu Jingqian looked at the sky, “Modest? What’s that? Can it be eaten?”

- Description from Novelupdates