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"Compared with its rivals, VIPKID has gained a lead. However, it faces some challenges in that the company is trying to expand its business to small-size private classes," he said.

"Compared with internet companies, our giant hardware base is the biggest edge in promoting Harmony. We ship about 300 to 400 million units of hardware every year, including smartphones, personal computers and smartwatches," Yu said.

"China, like other countries, will never allow anyone to engage in criminal activities, spread religious extremism and carry out violent terrorist activities under the pretense of religion," it said, adding that the report maliciously smeared and attacked the Chinese government's policies of governing Xinjiang and Tibet.

"Currently China lacks specific data on myopia, but clinical experience shows myopia is occurring at a younger age and worsening at a faster rate in China than the rest of the world," said Long Qin, a senior ophthalmologist at Peking Union Medical College Hospital.

"China, like the United States, has a problem with an uneven distribution of wealth, which can result in social tension and popular resentment toward the moneyed class," Moser says.