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China Petroleum & Chemical Corporation (Sinopec), China National Petroleum Corporation (CNPC) and the State Grid Corporation of China crown the top three spots on the 2019 top 500 Chinese companies in annual operation revenue, according to the latest top 500 Chinese companies list published on Sunday.

China and Poland have maintained good bilateral relations for a long time. And since the 1970s and 1980s, the two countries have respectively taken the path of reform and transformation.

China National Offshore Oil Corp, a leading domestic oil and gas producer, will expand its presence in the offshore wind sector this year to develop its clean energy portfolio, following its involvement in a related project in East China's Jiangsu province in January.

China and Spain will further enrich business ties in areas including high-end manufacturing, renewable energy sources, tourism and other service sectors over the long run thanks to developments brought about by the Belt and Road Initiative, officials and experts said.

China and the UK agreed to accelerate the final preparations and to review the timeline "when conditions permit" for launching the London-Shanghai Stock Connect, a scheme that is designed to allow companies from the two countries list on each other's stock markets.