Magi in the Prosperous Tang Dynasty

Li Qingyuan lived to be 256 years old in the Qing Dynasty. Zen Master Xuyun, who passed away in 1959, was 120 years old, and Master Zhang Zhishun, who became immortal in 2015, was 103 years old.

When I read the comments, I realized that there are quite a lot of talents. You use your big brains and think about it carefully. It's the first year of Zhenguan. What if Li Shimin's brain suddenly changes and the protagonist goes to see Jie Li instead of Tang Jian? What's more, there are still plans to kill Xue Yantuo, fight Tuyuhun, attack Tubo, attack Goguryeo, etc. Why must Mao be involved in the Anshi Rebellion? Secondly, you can at least survive until the end of Li Zhi's reign, right? Isn't it the same as not surrendering to An Lushan and vowing not to surrender to Wu Zetian?

Travel through time and become immortal? Furthermore, as a time-traveler, knowing clearly that An Lushan would rebel, Pig's Feet allowed him to rebel, and then went to suppress the rebellion. Was this a deliberate attempt to inflict a heavy blow on Datang?

From the name of Zhenguan Zhizhi, we can see that it is a period of governance rather than a prosperous era, but is it a good fight that requires the butterfly effect to be passed through the public? Not to mention the Anshi Rebellion, Wu Zetian had to suppress it, and even Gaozong Li Zhi had to kick it away. Why must it be written about Kaiyuan? Even if Li Zhi blocks the emperor, what if he loses his mind and uses Kaiyuan instead of Yonghui?

Looking at the introduction, the protagonist just went back in time and wandered around. What should have happened still happened as usual, and history was still the same as before, right?