1. Brand logo: namely "Chow Tai Fook".
2. Purity of gold: Gold bracelets are usually marked with the purity of gold. For example, "Au999" means that the bracelet is one thousandth of 999 gold.
3. Weight: The weight of the bracelet can indicate the gold content of the bracelet. The marking method is grams or "CT" (carat) numbers, generally in grams.
4. Manufacturer's logo: The bracelet may also be engraved with the manufacturer's logo to indicate the source of the product.