The Simple Life of Killing Demons - Chapter 15Book 12:

Gu Mingxi and Pang Qian were next-door neighbors, classmates, and deskmates. From year-to-year, even when the class seating was rearranged, they would still be deskmates. They grew up together like a pair of brother and sisters despite having different parents; if it was someone else, then their parents would probably have already arranged their wedding. However, Gu Mingxi was different.

Using the ability to freely travel between Earth and the fantasy world so he can… become a porter of two worlds…?

Bai Yang’s objective was to establish a production line that would yield hundreds of millions of pills, pellets, and artifacts…

- Description from Novelupdates

All Things of this World, Turn to Ashes, Flowing Blade-like Flame!