You can't. Except for the commercial system of Ginza, other Ginza homes and Ginza Xintiandi can't be used now, and even the unified Ginza can't be used now. Harmony Square is invested by Ginza Real Estate, so it can't be used.

Why is this happening now? The reason is that the state has promulgated the Measures for the Administration of Third Party Payment. According to this method, a company's card can only be used within the same legal person.