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"China today is also a major economic power and is open to working with the United States to resolve trade and market access issues, but not through intimidation," he said.

"Clearly, we see now that China is driving into a more sustainable economy, caring more about the environment, growing the service sector and really trying to become a leader in innovation," he said.

"Considering the many weeks of increased disease activity in younger individuals, including almost 50 percent of reported cases occurring among young adults aged 20 to 39 years in recent weeks, there is a very real possibility of the virus reaching higher-risk individuals, populations and settings. As well, with mild and asymptomatic infection occurring more often in younger individuals, it is possible to spread the virus without realizing," said Theresa Tam, Canada's chief public health officer in a statement on Friday.

"Citing the Joint Declaration as a justification for irresponsible remarks and interference in Hong Kong affairs has no valid ground. This goes against not only 'one country, two systems', but also the basic norms governing international relations," he said.

"Currently, technical workers working in the frontline still have comparatively low incomes and limited choices of development of their career path," Wang said. "It is important for the government to come out with more policy incentives and to build a population of technical professionals that can meet the demand for China's industrial internet development."