What business was the most profitable? Of course, it was a unique business! To the people of the cultivation world, this spirit wine business was a unique business.
The reason why the realm of arrays didn't produce spirit wine was very simple. To produce spirit wine, one needed spirit rice. However, spirit rice couldn't be grown anywhere. It could be said that growing spirit rice was no less troublesome than growing spirit herbs.
Not all the land in the cultivation world could be used to grow spirit herbs. Although the commoners in the cultivation world did grow spirit herbs, they were just common goods that were common in the market. The rice grown on that land could not be called spirit rice, so naturally, there was no way to make spirit wine.