The main part of the second phase of the National Convention Center is 460 meters long, 150 meters wide, and 45 meters high, with three floors above ground and two floors underground. It was designed by the famous French architect and Pritzker Prize winner Christian de Portzamparc. The architectural shape is grand, upright, and steady, and the facade is simple yet varied, like a Kunpeng spreading its wings, elegant and light, solemn yet cordial.

The overhanging eaves on the east facade convey the charm of traditional Chinese architecture and reflect the majesty, etiquette, and music of a great country and the transparency and openness of contemporary China with the intention of inverting the universe to the sky. The straight-up and down curved roof forms elegant lines.

As the final work of the Olympic Central Area, it adds a perfect touch to the central axis of Beijing, demonstrating the style of a great country with cultural confidence, openness, and tolerance, and inclusiveness. The single-piece shapes of the "bird window" curtain walls are mostly hypotenuses and hyperboloids, with window frames and window edge structures of irregular sizes and shapes. There are 6 or 7 large specifications, such as "hyperboloids, folded edges, and irregular window openings," and the three requirements combined make the processing and fabrication of the curtain wall an almost impossible task.

During repeated trips, inspections, and discussions, the "customized" plan for the second phase of curtain wall construction of the National Convention Center gradually became clear. Mold shaping in Changsha - mass production in Yongzhou - enameling in Zhejiang - centralized delivery to the Beijing project site. "Every piece of curtain wall installed on the east, south, and north facades of the building has experienced a journey of 3,000 kilometers."

Surface： 420,000 m2

Client： Beichen Group

Designer： 9Grid & 2Portzamparc