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China has pledged to reach its peak carbon dioxide emissions by 2030. It is also striving to achieve carbon neutrality by 2060. So, SPIC will build a stable, safe and economical clean energy system based on complementary multi-energy mix of hydropower, wind power, photovoltaic and energy storage in China for the long run, said Qian Zhimin, chairman of the Beijing-headquartered group.

China is firmly opposed to the report and has made stern representations with the US side, he said.

China has significantly improved its ability to ensure food security in recent years, being able to feed 20 percent of the world's population with 10 percent of the cultivated land and 6 percent of the fresh water in the world.

China is actively shaping a new development paradigm while it expands domestic demand and opening-up, which will bring new opportunities to Germany, Xi said.

China has seen an increasing reproduction problem, with the infertile population exceeding 50 million. Half involve infertile husbands with low sperm quality, according to official estimates.