I think it's the brand effect. After all, there are about three or four floors in a large shopping mall, and the location of the first floor can be said to be a prime location. On the one hand, jewelry can be advertised for free on the first floor (everyone who goes to the mall will pass by the first floor, whether they buy it or not, it is good for the store). On the other hand, they have the money to pay the rent. The second and third floors are basically selling clothes, and people like shopping.