How Could Li Ergou, the Protagonist of the Refreshing Novel, Be so Happy?

Li Ergou has been picking up food from the garbage dump for as long as he can remember. Today he stole the corn from the widow Zhang next door, and the day after tomorrow he stole the melons from the neighbor Lao Wangtou. One dark and windy night, an old man suddenly took him away. From then on, Li Ergou became the number one in the world of metaphysics, and his style shrouded him for hundreds of years.