Dragon Ball: The Boundless Saiyan

I am Lin Chen, a martial arts prodigy from Huaxia, and I've transmigrated into the body of a Saiyan baby named Kalef Lin. Since I know the story, I have to survive before Frieza destroys Planet Vegeta. I grow up alongside Kakarot and train in Huaxia martial arts. After the planet's destruction, I create the “Boundless Saiyan Fist” on a desolate world and set off to wander the universe. Planet Namek, the androids, Cell, Buu... With my foreknowledge and unique martial arts, I rewrite fate and protect Earth.