Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 5Book 1: -2: Camping at Night

When the research and development of various black technologies in the winery fell on Ye Genyi, he said that his position was a bit crooked.

Gin: “icewine…”

“Hey, this is the latest tracking software, it only takes 20 seconds to find the target…”

ps: This book is easy + crime solving + daily type

- Description from novelbuddy

In a world where power is dictated by gangs, cities, and families ranked from Tier 1 to Tier 6, only the strongest survive. In the Tier 4 city of Blackridge, fifteen-year-old Elijah struggles to find his place. With his mother working tirelessly and his younger sister depending on him, he has always kept his head down.Determined to rise above the chaos, Elijah and his best friend Kai decide to create their own gang from nothing. But strength in this world isn’t given—it’s taken. The gangs that rule Blackridge won’t tolerate competition, and even the weakest gang has more resources, manpower, and experience than they do. With no money, no reputation, and no clear allies, they must navigate a brutal world of betrayals, violence, and ambition, where every decision could mean life or death.But Elijah is different. He possesses a mysterious system that offers him power—at a cost. As he slowly uncovers its secrets, he realizes that survival is not enough. To protect those he loves, he must become stronger than anyone else. He must climb the ranks, crush the opposition, and seize control of Blackridge’s underworld.But in a world ruled by kings, warlords, and ancient families, the price of power is steep. And when the past comes back to haunt him—when whispers of a forgotten night resurface—Elijah must confront not only his enemies but the truth about himself.In the gang world, the strong rise, the weak perish, and only the ruthless reign supreme.And Elijah? He plans to reign at the very top

In the previous life, Jiang Peihuan was tricked by a scumbag and died tragically, which even caused her entire family to be wiped out.

When she was eighteen years old again, she was still the arrogant girl who refused to give in to her husband.

Her fiancé thought she had fallen into the water and lost her virginity, so he came to break the engagement and marry her cousin?

Everyone laughed at her, but she was happy to see the result: one hundred thousand taels of gold, I agreed to it.

After retiring from the engagement, it was rumored in the capital that she was abandoned when she was about to get married.

Unexpectedly, that unparalleled His Royal Highness Cheng Wang stood up: marrying her, why not?

Many well-known ladies’ spring boudoir dreams were shattered, but Jiang Peihuan was very moved and refused.

He is the emperor’s uncle of a scumbag, the youngest son of the late emperor, he looks suave and noble, but in fact he is ruthless.

She vowed to avenge her past life, protect her family and relatives, and did not want to have anything to do with the royal family.

But finally one day, she still accidentally became the envied Princess Cheng.

Jiang Peihuan recalled it, and became angry at the man lying beside him: Xiao Nanye, are you plotting against me?

His Royal Highness Cheng Wang, who was decisive in killing, couldn’t help laughing when he saw his concubine blowing her hair.

He whispered deceitfully, with a lingering voice: Forgive me, forgive me, I only want you alone in my life.

- Description from novelbuddy

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates