Being upright and honest as an official is the real priceless treasure. Lexi, named Zihan, was a wise minister of the Song Dynasty in the Spring and Autumn Period. During the reign of Duke Ping of the Song Dynasty (575 BC - 532 BC), he served as Sicheng (namely Sikong, renamed "Sicheng" because of the name Sikong of Song Wu Gong. He was in charge of construction projects, manufacturing vehicles and clothing equipment, and supervising handicraft slaves), and ranked among the six ministers.