The GIA certificate you mentioned is a certificate issued by the Gemological Institute of the United States, which is used all over the world. HRD certificate is a certificate issued by Belgium; IGI is another famous certificate in America; NGTC is a certificate issued by China National Jewelry Quality Inspection Center, which is the most authoritative certificate with the best circulation in China.
In fact, these certificates are based on the same appraisal standards. The GIA standard of the United States, the HRD certificate of Belgium and the national standard of China are also formulated with reference to the standards of CIBJO (International Gemmological Association), but the 4C (carat weight, color grade, clarity and cut) of diamonds are different. For example, we often say that the color grade of diamonds is IJ, which is actually a foreign standard. China's national standard is 95 -94 colors, but China's national standard is a recommended standard, not a mandatory standard, so you may still be given IJ color if you look at the certificate.
Every province in China has such a quality inspection department for your convenience. On the one hand, you can check the contents of the diamond certificate on the website of Fujian Quality Inspection Station through the certificate number, and on the other hand, it is convenient for you to come to the door in person.
So no problem.