Where did you buy Chow Tai Fook's value-added business? Only in Chow Tai Fook's self-operated stores will there be exchange rules: 1. When the price of gold is reduced by one gram that day, 30 yuan can recycle your old gold. 2. The new gold must be 30% larger than the original old gold, for example, buy10g old gold. 3. Just calculate the difference! In Nanjing, only two stores, Nanjing Shanxi Road Department Store and Nanjing Central Shopping Mall, can trade in the old for the new. The specific number can be called Baidu.