Walmart opens first small high-tech supermarket in China

BEIJING/NEW YORK (Reuters) - Walmart Inc has opened its first small high-tech supermarket in China, where smartphones can be used to pay for items that are mostly available on the U.S. retailer's store on Chinese online marketplace JD.com, it said on Monday.The world's largest retailer, known for its hypermarkets, is expanding in China as shopping with mobile devices gains popularity in the country, and as retailers and technology companies such as Alibaba Group Holding Ltd and Tencent Holdings