In the northwest of Guanghan City, Sichuan Province, there is a guarded area: the Sanxingdui archeological site, which is one of the most important archaeological discoveries of human in the 20th century. Inside Sanxingdui, there are lots of peculiar bronze wares. What are those strange shapes mean? What is the relationship between the culture of Sanxingdui and the Chinese culture? In 1986, two sacrificial pits were discovered and shocked the world. With a tall bronze tree, a large bronze head with protruding eyes and an upright bronze figure, there is a mysterious color surrounding Sanxingdui. What civilization did the ancient Shu people have? In 2021, there are new discoveries in Sanxingdui. Through this programme, the mysterious mask of Sanxingdui will be unveiled.