On this day, 48 years ago, on January 20, 1977 (December 2, 1976 in the lunar calendar), my country discovered a batch of precious dinosaur fossils in the Qamdo Prefecture of Xizang. On January 20, 1977, my country discovered a batch of precious dinosaur fossils in the Qamdo Prefecture of Xizang at an altitude of 4200 meters. This is the first time in the world that dinosaur fossils have been discovered at such a height.