Introduction to Beihang’s 60th anniversary countdown board: Beihang’s 60th anniversary countdown board has a novel and unique design. With Beihang’s school emblem as the background, it cleverly integrates the countdown display and the circular display. The overall shape is integrated, as if it is being watched. The rotating earth in the vast starry sky reflects the desire for knowledge and scientific spirit of Beihang people to explore the mysteries of the universe, and demonstrates Beihang's historical mission of promoting the development of my country's aerospace industry. The countdown sign is made of pure steel, with a diameter of 3 meters and an overall weight of more than one ton. The silver glow shines during the day and the night is colorful, attracting long-term stops and admiration from passing teachers, students and friends from time to time. It has become a beautiful scenery on the Beihang campus. Many teachers, students, and alumni took photos in front of the countdown board, hoping to express their love and attachment to their alma mater.