Snowstar

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet." 
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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Author's current works: War Online, My Soul Card is a Reaper
Author's other notable works:  The Last Slytherin, The Sharingan Hyuga
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You can also support the Author through Patreon or buy coffee on Ko-fi.com

https://www.patreon.com/snowstar

https://ko-fi.com/snowstar5061

Weapon seller in the world of magic

About an hour later, the Ji Clan representatives retrieved the hostage who was found to be unconscious at an inn. In the meantime, the princess was also informed. She arrived at the location, shortly after them.

Suspecting that they might harm them after getting back their kid, Zhan Tai, the deputy of Feng Wu, had long fled the inn but stayed hidden while roaming in the neighborhood.

Once he confirmed that Ji Guanli is with them, Zhan Tai abandoned Huo Fen and returned to the hideout.

As for whether Huo Fen betrays them or not, the prince himself doesn't worry about that. Why should he care?

The princess took them to the Imperial palace while also intending to interrogate Huo Fen about the location of Kunyu bandits as well as Lu Zhen's involvement in this crime.

Emperor Shang defends Mark