If it is bought through formal channels, it should be genuine. Don't worry, because genuine products may change color and peel, which many people have encountered. Maybe you can't understand why the quality of such a well-known brand is so poor. You can only say that there are really few ornaments that don't change color in the current gold plating process. If you buy through informal channels, it may be fake, but this decoloration has little to do with truth and falsehood, and there may be quality problems such as peeling or fading.