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"Contrary to our hypothesis, young adults with high (social media use) seem to be more, and not less, socially isolated," the researchers said in a study published in July in the American Journal of Preventive Medicine.

"Corruption in those areas has seriously violated the people's vital interests and happy life, and is posing a serious threat to public security," Zhuang said. "Disciplinary officers should be cautious and take effective measures to handle them."

"Chinese tourists focus too much on Hollywood and other popular attractions, and tend to neglect the history of Chinese immigrants," said Yih, who grew up in the Bay Area.

"Chinese people were especially impressed by the red coat that she wore during that visit. That red coat was so special and dazzling among all the gray, blue, brown and dark clothes worn by the Chinese people at the time. It conveys a natural feeling of warmness and friendship," he said.

"Cross-border e-commerce has made rapid and notable achievements since the pilot zones were established and has become a new area of growth for imports and exports," Li said. "We should facilitate domestic consumption and at the same time improve export quality in the global market."