The China National Grand Theater Project is a large-scale modern cultural facility invested and constructed by the government in the new century, and it is the highest performing arts center in the country. This project is located on the west side of the Great Hall of the People in Tiananmen Square. Our company undertakes the production and installation of the steel structure of the concert hall. The concert hall has 2017 seats. It is arranged in a triangle with the opera house and theater in a superelliptical shell with an index of 2.2. The roof of the entire concert hall is 14 meters above the ground, and more than 300 tons of steel roof trusses are welded. The entire construction period lasts for seven. Months.