Hangzhou Olympic Sports Center, the main venue of the 1st19th Asian Games in Hangzhou, is modeled as a blooming lotus flower. The main building of the main stadium of the19th Asian Games in Hangzhou consists of a huge main stadium and an attached indoor gymnasium. The main stadium is an open circular design, and the roof is composed of several curved thin shell structures, just like a blooming lotus. This design is not only beautiful, but also has good seismic capacity and spatial adaptability.