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"Empty-nesters who have a spouse, good income and educational background are better off psychologically than their peers who do not," the report said.

"Domestic tourism also faces change, while technology has become a key factor in users' experience," Tong said. "It has pushed technology providers to further upgrade their services, including artificial intelligence-powered services, interactive experiences and the use of big data to cater to the needs of tourists."

"Even if one day there are no native speakers of a certain dialect, people can still learn and revitalize it with the help of various apps like this," Cao, the linguist, said. "This is quite an innovative way to preserve languages."

"Even it costs more than usual, we will not increase the product price," said Roy Van Den Hurk, general manager of product of Milk New Zealand Dairy.

"Even though the league in China is developing and the income is good, the loneliness made it tough to continue," said Mbia, who had joined the club - based in Qinhuangdao, Hebei province - in early 2016.