Martial King's Retired Life - Chapter 3Book 16:

Wu Tao, a small mysterious trader, suddenly appears in the city of Jinan and encounters with Yuanbao, a foxy little beggar. Wu Taos identity as a trader is suspected soon, because on the day before he appears, Sun Jicheng, a millionare in Jinan dies a mysterious death, and people finds the dead one is his substitute. Around the countless wealth, confusing identity and the seven mysterious stars in the little beggar, various figures come on stage, starting a magical adventure story.

Gods and demons fought, the worlds collapsed, only eternal immortal realm, lasting in the world.

After eternity, a god of war named Zhao Yun condensed the heavens and the earth, recast the cosmos, from the blue to the earth, marked the eternal immortal realm, in the name of the god, the king is over the world.

Since then, what he said is a myth.

- Description from MTL

Waking up inside the ruins of an orphanage, Alexander finds himself chained and sold to slavery.

A modern metallurgist, trapped in ancient times, watch as he tries to play with the cards fate dealt him.

He will make plate armor, invent paper, build roads, teach governance and many more, as he tries to carve a place for himself.

But how can such things not attract jealous eyes?

The naval superpower- Cantagena,

The unstoppable army of- Exolas,

The superpower of the east- Adhania,

The mercantile confederation- Sybarsis,

The religious fanatics- Iyizarid,

And the ever-present- Barbarians of the Barren Forrest,

All want something from each other.

In this ocean of sharks, follow a small carp as it struggles to leap through the dragon gate and establish a dynasty to outlast them all.

Lin Tianlong, 19 years old, a polytechnic school graduate. With mastery and control over electrical energy, he displays his unparalleled sagely medical skills, accepting the hearts of beauties on the side. Starting by helping his sister-in-law’s small clinic which was on the brink of closing down rise from the dead, he then proceeds to bring prosperity to a private hospital previously in a business slump. Socializing among the officials from the sectors of politics, commerce, law, literature, education, and health in Flame City, he’s drawn into the power struggle between the officials. Businesswomen, doctors, and nurses, attractive policewomen, teachers, pretty loli girls, charming married women, mature beauties – all of them fall to his clutches as he establishes his business empire and a harem of beautiful women.

- Description from Novelupdates