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"China has multiple landforms including plateaus, mountainous regions and plains, so the helicopter must be able to operate in every landform. Foreign helicopters have not met our needs, especially those in plateaus and mountains," he said.

"China has become the second-largest trade partner for Latin America. The Belt and Road Initiative will further promote bilateral trade and help facilitate social exchanges and investment," said Gao.

"China has basically fulfilled all WTO rules and rulings," said Vice-Minister of Commerce Wang Shouwen during a briefing on the white paper on Thursday, quoting Adam Posen, president of the Peterson Institute for International Economics.

"China always believes that 5G technology is a frontier technology that leads the fourth Industrial Revolution and offers a valuable platform, and the development and utilization of 5G in a globalization era happens naturally as all countries undertake extensive consultation and joint contribution for shared outcomes," he added.

"But the pilot program is relatively limited right now, involving a small group of people. The trials' expansion may take more time; it would be a gradual process," said Li, who is head of the blockchain research group of the National Internet Finance Association of China, in an exclusive interview with China Daily on Monday.