Mourning Swallow

Su Li, who traveled through time, became a beggar and was picked up by an old man and accepted as his apprentice. Five years later, when Su Li came down from the mountain, he discovered that his master was the notorious number one villain... This is a period of growth for a time traveler from wandering on the edge of the world, to gradually integrating into the rivers and lakes, making friends, taking revenge, and finally becoming a great hero.