Wang Xuan's rare sigh, his kind of emotion is rare.

For those who study old techniques and want to go down this road, even if they are determined, it is a bit sad to hear such a conclusion.

The most powerful alchemists in the pre-Qin period were already at the limit of the old techniques, and they could only go so far. With the rise of technological civilization, they could easily strangle the handful of the most powerful individuals among ancient humans.