The project is located in Shougang Industrial Park, Shijingshan, Beijing.It is two identical open membrane structure exhibition halls specially built for the 2021 China International Fair for Trade In Services. The overall membrane structure is 90 meters long from north to south and 50 meters wide from east to west. A triangular steel arc arch in the middle spans north and south. The maximum section height of the steel arc anch is 2.8 metens by 2.5 meters wide, and the maximum elevation of the upper chord is 14,8 meters. The whole structure is elegant and dynamic.