Demon Slayer : The Silent Journey - Chapter 4: Path to strength

Traveling through time, he became Zhang Gui, a foreign relative of the Tianqi Dynasty. Because he didn’t want to be tortured to death by Li Zicheng in the future, he had to embark on the road of harming the powerful and bureaucratic officials of the Ming Dynasty.

The Yanguan scolded him for coercing the king and making disorderly manners.

The prince scolded him for being greedy.

The official hates him for being mean and cruel.

But helplessly, most of the Nine Frontiers are his lackeys, and even Jiu Qiansui is his godson, and the emperor can’t do anything about him.

Therefore, the Ming Dynasty was at the mercy of him.

- Description from novelbuddy

The tombs of the gods have appeared in the world!

A man suddenly finds himself inside the world of his favorite game, Brave Hearts, after a night of gaming...Mistaken for “Raye Alvah,” the ruffian second son of a duke, he faces hostility from strangers and is publicly disowned by the noble family!And as he pieces together his strange new reality, he realizes he’s living as a minor villain destined to be forgotten after being defeated by the protagonist!And now...“Fuck this shit, why did it happen to me?”He must adapt to survive in this world.

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.