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China revised its national economic industry classification in 2011, and has not updated it since.
China is willing to share its achievements in scientific innovation with other countries, in order to improve the world economy and address international challenges, Liu Yandong, the nation's vice-premier, said in London on Wednesday.
China started research on the energy source in the late 1990s. Its first gas hydrate samples were collected in the South China Sea in 2007.
China recently surpassed the European Union to become Brazil's largest export market. China is now a leading foreign investor in Brazil.
China supports the self-reliant and sustainable development of Africa, and is ready to work with African countries including Senegal to maintain and develop the FOCAC mechanism, Xi said, eyeing greater contribution to the comprehensive strategic and cooperative partnership between China and Africa.
来源：资阳报