With sapphire as the medium, the Expo will build a stage to expand exchanges and develop a win-win situation. 20 17 China (Changle) International Gem Expo was held grandly. The theme of this Expo is innovation, development, cooperation and enjoyment. With sapphire as the medium, the Expo will be set up to expand exchanges and develop the exhibition concept of * * *, which will further inherit and carry forward the jewelry culture and promote the transformation and upgrading of Changle's gold jewelry processing trade industry. As the birthplace of Jiangqi culture and the sapphire capital of China, Changle is rich in cultural heritage and mineral resources. Sapphire mining area in the county is 450 square kilometers, with billions of carats, and it is also called the world's four largest sapphire mining areas with Thailand, Australia and Sri Lanka.