The 14th Construction Expo held in Guangzhou from July 8th to 11th attracted many domestic businessmen to visit and negotiate. Shuangshan Hardware Belvedere copper locks attracted many businessmen to visit and negotiate with its unique product style, as the strategy of the Great Hall of the People. As a partner, Ruili Hardware has launched products specially designed for the Great Hall of the People and has launched a series of locks that have passed the B-level anti-theft detection of the Ministry of Public Security in response to the current development trend of domestic villas. There are 15 dealers in the blank area, and 8 large door factories have been signed.