I bought a gold necklace and pendant of his brand 18K in 2004. I bought it in an expensive shopping mall. It seems that only a 10% discount has been given, which is quite expensive ... At that time, the list said that you could trade in the old one at any time and add money to buy a new one at the price when you bought it. It was a gift from someone else at that time, and I have finished thinking about it. It is estimated that there are counters in this shopping mall. If it is yellow, what should I change? I'm glad to see your post today …