Yes Guangzhou Hualin Jewelry Market is one of the largest jewelry trading centers in Guangzhou, with many jewelry merchants. Among them, coral is a kind of gem material that attracts much attention. There are many coral merchants selling red corals in the market. However, due to the high price of red coral, some unscrupulous merchants will use doping, dyeing, heating and other means to improve the color or hardness of red coral in order to deceive consumers.