Honghuang Bookstore: If the Customer Becomes a Saint, I Will Win

Su Xuan traveled to the prehistoric world, but the awakening bookstore system made him despair - open a bookstore deep in this Shituo Ridge, who will it sell to? The first customer turned out to be a green-faced and fanged monster, and Su Xuan forced himself to sell it. Unexpectedly, after reading "Yangxian", the monster realized the supreme power on the spot. What's more, Su Xuan didn't expect that Su Xuan gained all the other party's cultivation at the same time. When the leader of the Tongtian cult came to buy books, and when Sun Wukong called him boss while holding "The Legend of the Great Sage", Su Xuan discovered that selling books was the most buggy way of cultivation in this ancient world. "You fight life and death, and I will become a saint while I lie down."