Lu Rongxing has a source of laughter, and that is Guan Jie. As a child, he thought Guan Jie was a goofball, thoughtless in everything and endlessly amusing. But as an adult, he realized Guan Jie was a treasure of humanity, because happiness in adulthood is so rare. They say life has three stages, and Lu Rongxing’s attitude toward Guan Jie followed the same pattern: laughing at him, nagging him, loving him.