Authentic. The American ginseng upstairs in Hong Kong is authentic and has special after-sales guarantee. This is a real Citigroup. Hong Kong Upstairs was founded in 1998, and was first operated as an upstairs store. In line with the business philosophy of customer first and quality first, we provide high-quality products and services. There are many kinds of health tonics, all from the country of origin, with high quality and low price, which are deeply loved by Hong Kong people.