The First Arms Dealer of the Great Tang

Welding specialist Fang Er dies and transmigrates to the Wu De era, learning the Turkic tribes are advancing south. He moves his family fortune to Chang'an. Using his system and skills, he crafts furniture, brews wine, refines salt, and builds water wheels. He also introduces gunpowder, muskets, and cannons to the Tang dynasty, meeting Cheng Yaojin, Yu Zhiji, and Li Shimin before being appointed a school guard. Later, he manages the Fang family estate, establishes a steel school, leads troops to defeat enemies, and invades Goguryeo. During the New Year, he creates the first fireworks display in the Tang dynasty and delivers a cart of them to the palace.