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China appreciates Russia's efforts to ease tensions on the Iranian nuclear issue and to strengthen regional security, Zhao said.

China has huge potential in new infrastructure and the country welcomes South Korean companies to take an active part in the construction of information infrastructure, integrated infrastructure and innovative infrastructure, said Chinese ambassador to South Korea Xing Haiming at an online seminar attended by South Korean companies.

China began to construct its Beidou navigation system, named after the Chinese term for the Big Dipper constellation, in the 1990s and started to serve the Asia-Pacific region since 2012. It is currently one of the four largest space-based navigation networks operating globally, along with the US GPS system, Russia's GLONASS and the European Union's Galileo.

China has been importing a large amount of high-end medical equipment, pharmaceutical equipment, pharmaceutical preparations and biological preparations from the US, and the rapid growth of imports in the past few years helped to reduce the trade surplus.

China exported goods worth 11.86 trillion yuan (.71 trillion) in the first three quarters, up by 6.5 percent compared with the same period last year, according to the General Administration of Customs. At the same time, imports and exports of goods increased by 9.9 percent to 22.28 trillion yuan.