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China and Portugal should strengthen multilateral coordination, enhance communication on major international and regional issues and jointly safeguard multilateralism and free trade, Xi said.

China and California can work together on "smart" technologies to better control renewable energy, according to a researcher.

China and the US have great potential to cooperate in international and regional security matters, such as the Korean Peninsula nuclear issue, Fan said. Strengthened coordination between the two important parties involved is necessary for a peaceful solution, Fan said, adding that the two countries should work together to lower tensions in the area.

China and Russia are facing different pandemic prevention and control situations, with differentiated methods in tackling difficulties, Han said, adding media from both sides should enhance mutual empathy and understanding in reporting pandemic news by focusing more on human interest and feel-good stories.

China Mobile Communications Corp, the world's largest mobile carrier by subscribers, has submitted a proposal to build a large data center and connecting office in Silicon Valley.