In June 2015, the 20th China International Construction Trade Expo, which was dominated by doors and windows, architectural decoration and wall decoration, opened in Shanghai. It was held in Guangzhou every year and was first landed in Shanghai. The exhibition site of the Expo is located at the four-leaf clover national convention center (Shanghai), which was completed at the end of 2014. The exhibition covers an area of more than 100,000 square meters and brings together professional exhibitors from all over the world.