China Gold is a well-known brand of gold jewelry, and its products are generally tested and certified through formal channels. The bracelet you bought has the steel seal of China Gold, which means it is a product of this brand.

"HB" is usually the abbreviation of manufacturer or processor, and 999.9‰ pure gold indicates the gold content of bracelet. According to national regulations, the gold content of pure gold should reach above 999.9‰. So the bracelet you bought is in line with the regulations.

Of course, when buying precious metal jewelry, we must choose formal channels and reputable brands to ensure quality and authenticity. At the same time, if in doubt, you can consult the merchants or relevant institutions in time.