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"China's environmental industry maintained a growth of about 17 percent in 2017, and the growth of the environmental engineering and equipment sector specifically could reach 15 to 30 percent in 2018," said Wu Shunze, director of the environmental and economic policy research center at the Ministry of Ecology and Environment.

"Compared with other regions in the capital, the traffic and weather conditions of Yanqing are not the best," said Jiang, who is also deputy director of the expo's organizing committee. "I was a bit worried whether Yanqing could represent Beijing to bid for the expo in 2012."

"China will work with the United Nations, the World Health Organization and other partners to assist Africa's response to COVID-19, and do it in a way that respects the will of Africa," Xi said.

"Chinese companies are attaching more importance to enhancing the competitiveness of their products by increasing their efforts in technology research and development," said Xu.

"Compared with major crops such as rice, wheat and corn, soybean has much lower yields and requires more land, which is a major reason why it has not been promoted as extensively in China because of limited arable land," Han said.