Premier, I tell you that these stores are not manufacturers, but retailers, and their products are also imported from wholesalers, agents and manufacturers, so the quality of jewelry has nothing to do with the brand, such as Chow Tai Fook and Luk Fook's pure gold. . . . . These big brands are all pure gold, so are some small jewelry processing shops, and so are PT950. It is impossible for PT950 to become a PT990 gem of a big brand store, but it also depends on the quality. For example, diamonds are graded according to 4C certificates. What is your level in ordinary stores and in big brand stores? Not to say that the level in big brands is higher! As for the switch, it is purely superstitious!