Zhang Zhe studied at the top university in China. He is a college student and a man of science and engineering who loves history. He has rich knowledge of science and engineering. By chance, he time-traveled to Li Yuan, the first emperor of the Tang Dynasty. At the same time, he made friends with Liu Xue, who was also a time-traveler. The two met in the early days of the founding of the Tang Dynasty. When it was in ruins and waiting to be revived, they dealt with it calmly. During this period, the two also had a secret love. With their profound knowledge, the two gradually modernized the Tang Dynasty and scientifically developed casting, arms, farming, catering and other aspects. With the help of thermal weapons, they were invincible. In the end, the reputation of the Great Emperor of China was known to the world.
