Huachang jewelry is not stamped, which means it is unqualified. When buying gold, one of the main signs is the steel seal on gold jewelry. Gold jewelry should be stamped according to national regulations. If there is no steel seal, it means it is unqualified. Don't buy it. Gold has two abbreviations, one is gold element Au in chemistry, the other is G (meaning gold), followed by numbers, such as G750 and Au999. Pay attention to buying gold jewelry, and don't buy jewelry without these steel seals on the inner wall.