On March 1, 1644, a strange phenomenon suddenly appeared in the sky outside Chang'an City (Xi'an). I saw a giant red iron box falling from the sky, wrapped in faint blue light. The container door opened, and a short-haired young man in a suit and tie holding a QBZ-191 automatic rifle walked out. At this time, a Dashun Army patrol rushed up. Attempting to encircle Liu Bang, Liu Bang faced the charging enemy. Kill the leader with one shot and throw out ten grenades. The enemy's troops were frightened by the news, and fled to the gate of Chang'an City. The two sides were about to confront each other. I saw one person walking out from upstairs. A sword fight was averted. He was the commander of Dashun Army Xiaohe, and Liu Bang became the city lord. He called himself the King of Han, changed the army to the Han Army, and raised a red banner with the word "Han". King Chuang, who was approaching the capital in the direction of Datong, was convinced by the same method. Liu Bang treated Qin King Zhu Cunji favorably, selected 20,000 people for modern military training, and selected 300 winners from among them. Train with rifles and become 300 Guardsmen. With the addition of 20,000 specially trained elites, they marched all the way east to conquer Taiyuan, Datong, Luoyang, Kaifeng and Zhending, approaching the capital and conquering Shanhaiguan. The emperor had no choice but to accept peace talks and achieve peaceful liberation. Liu Bang established the Han National Republic