Datang: I Use Douyin for Li Shimin

As soon as automobile engineer Gu Qingzhou opened his eyes, he fell from the sky and hit the imperial road in the sixth year of Zhenguan. The body was fifteen years old again, with a knife on his neck and Li Shimin standing in front of him. What's even more outrageous is that his phone that was supposed to be scrapped suddenly lit up - not only could he browse Douyin from later generations, but it also had an additional mall where points could be exchanged for medicines, seeds, and daily necessities. Gu Qingzhou spent all of his 100 points at the beginning to save the critically ill Changsun Queen. Since then, the painting style of Datang has completely changed. Li Shimin watched popular science videos and asked questions about how to mass-produce steel, how to control gunpowder, and why steam engines can move the world; the prince learned about budgeting, the King of Wei dismantled machines, and Princess Changle drew the knowledge of future generations into an atlas that people in the Tang Dynasty could understand. Gu Qingzhou led the craftsmen, starting from white sugar, refined salt and standardization, and gradually built steel, railways, fleets and a new world order. Several years later, envoys from all over the world came to Chang'an and finally understood—— The young man who fell from the sky and used Douyin for Li Shimin really brought Datang into the industrial age.