Chow Tai Fook Jewelry promises to enjoy the following services free of charge from the date of purchase: ring adjustment, beading, renovation/polishing/shaping/welding, and bracelet and necklace size adjustment. Generally speaking, gold and silver jewelry will be engraved with numbers and letters, which is equivalent to the role of certificates, including the following situations:
1. Manufacturer code/brand name. Major well-known jewelry brands will engrave their own logo on jewelry, such as Chow Tai Fook is CTF, Xie Ruilin is TSL, Leofoo is CLF and so on.
2. Letters represent species and numbers represent purity. Gold is Au or g, silver is s, gold is PT, palladium is Pd, gold is GP or KP, and gold is KF. Numbers represent purity. For example, S925 is 92.5% pure silver.