Xiaohei was picked up by Li Weigang when he was ten years old. That day when he was collecting herbs in the back mountain, he saw a black mouse smaller than a palm being surrounded by several wild cats and covered in blood. His heart softened and he took it home in a backpack. After raising him for all these years, Xiao Hei has never bitten him, nor does he run around, except for occasionally grabbing dried meat from the kitchen when no one is prepared.