Li Shimin, Emperor Taizong of the Tang Dynasty, accidentally traveled to the modern city in a trance and woke up in the rental house of Xu Mengxiao, a graduate student in the history department. Facing the "monstrous world" of incandescent lights, glass windows and steel and concrete, the Emperor of the Tang Dynasty was shocked. He was also shocked because "Chang'an" was marked as "Xi'an" on the map and heard that "the Tang Dynasty fell at the hands of Zhu Wen" and he fainted on the spot.
Xu Mengxiao, a modern social animal, initially thought it was the landlord's son cosplaying and "acting", but after Li Shimin appeared repeatedly and his words and deeds were highly consistent with historical records, he was forced to accept the supernatural reality of the real Taizong of the Tang Dynasty.
Very good, worth a look