Customers enjoy food at a new Costco store in Shanghai on the first day of its trial operation on March 10. China News Service | China News Service | Getty ImagesBEIJING — If retail sales slowed this summer, it hasn't felt that way in parts of China. In the weeks around early July, New York residents David and Susan Schwartz visited three Costco stores, known as warehouses, on the outskirts of Shanghai and the neighboring city of Suzhou. China's retail sales slowed to a 2.5% year-on-year increase in July, adding to growing uncertainty about the country's future growth. Chris Reitermann CEO, Ogilvy Asia Pacific and Greater ChinaThe massive property market, where the majority of household wealth is stored, accelerated its decline in July.

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Persons: hasn't, Susan Schwartz, David Schwartz, David, Susan, Malin, Goetz, Kate Spade, they're, Chris Reitermann, Ogilvy's Reitermann, Daniel Zipser Organizations: Costco, China News Service, Getty, BEIJING, U.S, Ogilvy Asia Pacific, CNBC, McKinsey Global Institute, Media, McKinsey Locations: Shanghai, China, New York, Suzhou, U.S, Hangzhou, Ningbo, York, Greater China