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Particularly, the vaping rate among young people was higher than other age groups, with those aged 15 to 24 the highest, the survey said.

They challenged the bottom line of the "one country, two systems" principle by swaggering through the street with foreign national flags and defacing the Chinese national flag and emblem, he said.

Hailing remarkable achievements made by the Chinese people in the past 70 years, Xi said absolute poverty, a problem that has plagued the Chinese nation for thousands of years, is coming to an end.

Swiss tech giant ABB began construction of its new 67,000-square meter robotics manufacturing and research facility in Shanghai in September with an investment of 150 million U.S. dollars.

A total of 502 economic cooperation deals were signed at the event, of which 439 were international projects.