Time and Space Wandering

In order to advance the process of human civilization, future scientists decided to travel to the Qin Dynasty to help King Qin complete the unification of the earth. An alien agent suddenly appears in the laboratory, trying to sabotage the plans of scientists around the world. Due to carelessness, the time shuttle was destroyed, and this time as a time wanderer, I was mistakenly transported to the turbulent era of the late Sui Dynasty and early Tang Dynasty. Because of the different time and space, I became Li Shimin, the son of Li Yuan. In a chaotic situation, I not only have to survive but also adapt to history, otherwise time and space will disappear in the future. Under such difficult conditions, the Tang Dynasty finally lived up to expectations and achieved prosperity. Just when I was happy, news came from the future that history was being destroyed. The reason is that Li Shimin himself in this time and space was imprisoned in the time and space cage because of my arrival... Finally, with the efforts of my space assistant "Xiao Ben" and I, we went back to the future through all kinds of hardships. At this time, alien civilization was already at war with the earth. Carrying the hope of the human race, I once again set out to travel through the long river of history, just to bring variables to mankind's final push. The universe is still the universe, but the universe is no longer the universe. For the end of the human catastrophe...