Li Xuan traveled through time, without a system or cheats, and could only temporarily hide in a small mountain village. One day, he was mistaken for a reclusive master, who insisted on becoming his disciple. As a man of integrity, Li Xuan had no desire to deceive and flatly refused. However, the offer was too much, so he fabricated a cultivation method to deceive the other party—and surprisingly, his disciple succeeded! Looking at his disciple, whose muscles and bones were throbbing and whose energy was surging, Li Xuan was stunned. "I made it up! How did it succeed? What kind of monster are you?!" At this moment, a golden finger appeared: "Your disciple practiced the technique you invented to get started, and you immediately achieved mastery, becoming a hundred times stronger than anyone of the same level!"

Hilarious fun and can be wholesome at certain point, started out pretty slow but it gets really fun. If you want elaborated BS, I mean full of imagery and building of Martial Arts with all the bells and whistles it is here.