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The year 2017 has seen an increase in the popularity of Mandarin in the United States. According to a national survey conducted by American Councils for International Education and released in June, 227,086 U.S. students ranging from kindergarten to grade 12 had enrolled in Chinese language courses.

In its recently released industrial strategy, the British government identified energy transition as one of the key global challenges. "The best solution to these challenges is when countries could work together," Clark said, adding that Britain and China have built a strong foundation for working together on this issue.

The Chinese minister arrived in the Angolan capital Saturday on the second leg of his four-nation Africa tour. Wang, who flew in from Rwanda, will visit Gabon and Sao Tome and Principe after Angola.

China has acceded to international conventions covering criminal judicial assistance, such as the United Nations Convention Against Corruption and the United Nations Convention Against Transnational Organized Crime. It has also approved 54 bilateral treaties related to criminal judicial assistance.

Currently, challenges and opportunities co-exist on the Korean Peninsula, Xi said, expressing the hope that the PyeongChang Winter Olympics will not only bring about opportunities for inter-Korean dialogue, but also help improve the situation on the peninsula.