Age of Mecha: Divine-grade Genetic Extraction - Chapter 156 - The Released Slaves

A con-man and policewoman that are legends of their respective professions suddenly die, then are reincarnated and return to the Tang Dynasty of ancient China as little kids.

Accepting their second chance and forced restart, they choose to use the modern knowledge and specific talents that they have in their previous lives in order to live comfortably in this new life.

- Description from Novelupdates

Chuang Shi Shen created a system world in Boredom, where thousands of NPCs travel in various time and space to help the host fulfill his wish. Bei Qiu is one of the NPCs, an NPC whose teeth are stuck in cold water. She protested that NPCs also need to have love, affection, meme, and papapa! Someone directly threw her into the female supporting role strategy system! One of the most difficult and cheating system! Bei Qiu said: “Leader, I am with you, can you hold your hand high?” Zhong Yexuan said: Get out. Raiders president, Raiders monk, why did she become the zombie king? Do you want to attack the orcs who can solve their animal desires anywhere? She said no!

- Description from novelbuddy

The protagonist travels through Shu Mountain and becomes a demonic dragon guarding the heavenly book in Dinghu Peak.

“VILLIAN!? Is that what you call me? Do you know what I have been through?

FATE dealt me this hand, and I'll find peace in it. Even if I have to end the world, I'll sit a king on its ruins.

I'm not a good guy. I won't even pretend that I am. But then again, who in this world can truly claim that title?

At least I know my heart. What about yours?”

.....

Chiron lived an unfortunate life, but his problems only got started when he was reincarnated in his dangerous Hit novel.

Behold, a lesson to all authors... MC's have it difficult too.