Upstairs is a brand of Shanghai Deng Mei Zhu Bao Co., Ltd., which is a brand-new jewelry sales model. The so-called "upstairs" is to open the jewelry store to a high-end office building and let customers shop in the office building upstairs. Brand-new marketing model, the jewelry store into the high-end office building, not only saves the high rental cost of traditional jewelry stores, but also saves the high counter fees and shopping mall deduction points caused by entering the shopping mall.