Is Jiufuyuan Jewelry the one in the office building? A friend of mine bought diamonds there. They were really cheap. The quality of the 40-point E color vs 1 3ex she bought is at least about 230,000 in the shopping mall, but it is less than 1 10,000 in Jiufuyuan Jewelry, and it is certified by GIA. Diamonds have numerical codes on them, which can be found online. It's very formal, just in Zhongnan Road.