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

The next day morning;

Royal Palace, Lunaris City, Western Moon Kingdom;

"Welcome, Lord Lu, Lady Song, and the honored guests, to Lunaris City. Your presence in my palace is a great honor; may our alliance bring prosperity to both our families."

The King of Western Moon, Shen Niu, accompanied by his daughter, courtiers, and officials, greeted the guests with a formal deep bow, showing reverence and acknowledging their presence. Mark and Song Yue respond bows with equal respect.

If this was any other normal visit, such formality was unnecessary. But, since it holds special significance, the king treated Mark already as his son-in-law and gave him the respect he deserves.

Wedding whispers: Plans for a destination celebration