In the winter sun, the National Speed ​​Skating Stadium ("Ice Ribbon") looks particularly beautiful. As a landmark new competition venue in the Beijing competition area of ​​the 2022 Winter Olympics, it has the largest all-ice design in Asia, with an ice surface area of ​​nearly 12,000 square meters. A few days ago, when I walked into the National Speed ​​Skating Hall, I saw that the ice-slab concrete structure of the venue had been completed, and a concrete floor of about 12,000 square meters was presented smoothly. What is surprising is that the largest difference in flatness of this huge concrete floor is no more than 5 mm.

　　Ready to make the "fastest ice"

　　Wu Xiaonan, deputy general manager of a state-owned company and chairman of the National Speed ​​Skating Hall Company, often describes the "ice ribbon" as "intensive farming, rising from the ground, weaving the sky, flying ribbons, the fastest ice and wisdom pavilion". He introduced that the ice slab concrete production of the National Speed ​​Skating Stadium has been completed, laying a solid foundation for the realization of the "fastest ice" in the next step. "In late October, after 48 hours of uninterrupted construction, we finally produced a complete concrete floor with a thickness of 17 cm. The highlight of this project is that we controlled the level of the entire floor to about 4 mm, which means that If a small steel ball is on the ground, it basically won't roll."