999 gold means that the purity of gold reaches 99.9%. Although both bracelets are made of 999 gold, the price difference may be caused by the following factors:

Brand premium: Chow Tai Fook is a well-known jewelry brand with a high brand premium. Brand premium means that consumers are willing to pay extra for a brand of products. So the price of Chow Tai Fook's 999 gold bracelet is relatively high.

Manufacturing technology and design: different brands of bracelets may have differences in manufacturing technology and design. If Chow Tai Fook's bracelet is more elaborate and unique in technology and design, the price may increase accordingly.

Sales channels and positioning: the sales channels and positioning of different brands will also have an impact on the price. If the bracelets of the old temple are sold through traditional channels and Chow Tai Fook's bracelets are sold through high-end jewelry stores, the price of Chow Tai Fook's bracelets may be higher.

It should be noted that the above factors are only some factors that may lead to the price difference, and more factors need to be considered in the specific situation. If you are confused about the price difference, it is recommended to consult the sales staff or learn more relevant information to get an accurate explanation.