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Amazon’s timetable for same-day delivery. (Amazon Photo)

Among individual companies, Walmart surged 6.4 percent after unveiling a long-discussed membership program to provide free delivery and compete directly with Amazon's popular "Prime" service.

Amid fears of business slowing down in Chinatowns and Asian communities such as Flushing, city officials have told people not to change their day-to-day activities.

Among the six AI demonstration zones that the city plans to construct, AIsland serves as an ideal prototype mimicking what future metropolitan life could look like. The 66,000 square-meter special zone in Zhangjiang Science City, Shanghai's science and technology hub, will conduct a number of pilot programs such as smart parking, intelligent lighting, environment monitoring and unmanned convenience stores. The first batch of entrants includes international and domestic technology luminaries IBM, Microsoft, Alibaba, Tencent, SenseTime, and a research facility affiliated to Tongji University. The zone will feature the city's first 5G+AI pilot zone and host over 8,000 research and development personnel.

Amazon’s fashion push has traditionally been blunted by the problem that shoppers couldn’t try on clothes to see how they fit before purchasing them. But Amazon appears determined to rectify that issue with Prime Wardrobe, a service that lets online shoppers select and ship a box of clothes, shoes and accessories to their homes to try them on before buying.