Save the Tang Dynasty

The emperor Zhu Wen of Tang Dynasty was fighting until he was fifty-five years old. He fell ill in his later years. Just when Li Keyong, Liu Rengong and his stupid sons were preparing to kill him, Qin Xuan, a 21st century science and engineering geek, suddenly appeared on the dying Zhu Wen and said that he could live for another five hundred years! It is impossible to die, not in this life. Qin Xuan said that if he could not die, he would come to reorganize the chaotic world in the late Tang Dynasty! [Joking about history, don't study it in detail]