Nine. The code of each factory is different, and the supply of goods produced by each processing factory is also different. According to the factory code, Chow Tai Fook has 9 processing plants. One of the best foundries is Longjia Jewelry. Longjia Jewelry is located in Shatoujiao, Yantian District, Shenzhen, and belongs to one of Chow Tai Fook's foundries. The style and technology of the jewelry produced are the same as those produced by Chow Tai Fook, and it is the best one.