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China Tower is also expanding its presence in battery storage services which will be used to power China Post's electric transportation vehicles and nationwide outlets. The duo will also jointly explore other cooperation opportunities in building a smart society.

China and Russia see huge potential in energy cooperation, and the project will play a significant role in reducing pollution through upgrading the country's energy mix as natural gas has huge consumption potential in China, he said.

China Unicom noted it will continue welcoming foreign companies to participate in domestic 5G construction.

China and El Salvador established diplomatic relations in August 2018 after the Central American country severed "diplomatic ties" with Taiwan.

China Resources Beer Co Ltd, the largest brewer in the country and the maker of the best-selling Snow Beer brand, has signed an agreement with Dutch premium brewer Heineken NV to further develop the high-end beer market in China.