Don't panic when traveling through the late Ming Dynasty, just go to Liangjian and buy a machin

(Late Ming Dynasty) + (Sword) + Double-through Door. A modern man traveled through time and became Mao Wenlong, whom Ye Zhupi hated the most, and also got a golden finger of double-through door. On the other side of the double-through door, it turned out to be the way to the world. Mao Wenlong hurried to find Li Yunlong to buy a machine gun. He was ready to bring guns and cannons back to the late Ming world to become bigger and stronger and create glory again... But Li Yunlong was reluctant to sell the machine gun, and was also reluctant to give up the silver and century-old ginseng that Mao Wenlong brought. So Li Yunlong had to work to pay off his debts - sending soldiers to help Mao Wenlong fight the Jiannu......