You can pay at a restaurant by smiling at a camera

HANGZHOU, CHINA - SEPTEMBER 01: A customer purchases goods via Alipay which could collect money through recognizing customers' identity at KFC's KPRO restaurant on September 1, 2017 in Hangzhou, Zhejiang Province of China. Alipay uses face recognition system to collect money when customers take commodities to pass through a payment gateway. (Photo by VCG/VCG via Getty Images)

As easy as it is to make purchases in the era of tap-to-pay services, it’s about to get easier still. Alipay (which handles purchases for Chinese shopping giant Alibaba) has launched what it says is the first payment system that uses facial recognit…

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