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China has unveiled a host of measures to free up foreign trade channels, with steps to facilitate the normal operation of international sea, air and rail routes and express delivery services as the novel coronavirus pneumonia pandemic disrupts world trade.

China has rapidly emerged this year as the second-largest market for smart speakers after the United States, according to the latest report by industry tracker Strategy Analytics.

China has used the 2005 height as the official standard since it was made public in Oct that year.

China is the world's most populous country. The population's slow rise is projected to peak around 2025. As the Chinese society is aging, huge demand for healthcare services is likely as incidence rates of various diseases related to old age are expected to rise, he said.

China has vowed continued efforts to prevent various financial risks and foster a healthy investment environment, with the country's two major stock exchanges having already released rules to force companies to exit the equity market for serious law violations.