Because according to Tian Yan, Shenzhen Longhua, Shenzhen No.8 Warehouse, is one of the largest wholesale shopping malls in China. Clothes are sold at wholesale price, and there is no middleman, so they are not expensive.
The full name of Shenzhen No.8 Warehouse is Shenzhen No.8 Constant Temperature Storage Co., Ltd., which was established in 2006.