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"Each user in turn would be contributor of the more data to enlarge the data pool of the machine-assisted learning and assessment," he explained. "Bigger data, richer information."

"Despite the decline, China's services trade saw a largely stable trend in the first half. Services exports outperformed imports, with the services trade deficit narrowing by 46.1 percent from the same period of last year to 401.7 billion yuan," said Xian Guoyi, director-general of the ministry's department of trade in services and commercial services.

"Drones are playing a critical role in improving the efficiency of anti-pandemic activities and reducing the burden of frontline service personnel. This experience is beginning to be valued by European countries and the US," said Xie Tiandi, DJI's director of communications.

"Digital and delivery are long-term strategic drivers of our business, and I am pleased to build on our technological know-how and capabilities in this high-growth area," Yum China Chief Executive Micky Pant said in a statement.

"Everyone hated the old tradition of extravagance, but was reluctant to reject an invitation," Xiao said. To earn their money back, residents had to take advantage of every excuse to hold banquets. Some even moved their birthday celebrations from summer to hold them during Spring Festival, when people working outside the village would return home.