Traveling back to ancient times from the Western Han Dynasty

In order to protect himself, the young man practiced immortal arts, realized the great way, and traveled back to the ancient times through the river of time, pursuing the secrets of heaven and earth, making friends with the emperor, accompanying the emperor's daughter, painting for the world, and playing chess for heaven and earth. And all this started in the Western Han Dynasty, from protecting the young Xuanyuan from leaving the Youxiong tribe. The author: I want to write a story about the virtuous immortals and the struggle of the human race, and will not involve too many plots that have been written too much, such as Longhan, Wuli, Fengshen, and Journey to the West. ...