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"China has become the largest producer and consumer of automobiles in the world. The extensive use of private cars in cities is causing congestion, air and noise pollution, and road accidents. In metropolitan areas, the transport sector is estimated to account for at least one-third of greenhouse gas emissions," Engstrom said.

"China hopes to work with all parties to seek common development and share prosperity as the initiative proposed in 2013 aims to build trade and infrastructure networks connecting Asia with Europe and Africa along the ancient Silk Road trade routes," said Ma Wensheng, deputy secretary-general of the Charhar Institute think tank.

"China is not only the biggest exporter of manufactured goods, but also a major exporter of intermediates used by factories across the world. It is also a key supplier of materials or components for sectors including autos, shipbuilding, electronics, machinery and textiles," Bai said.

"China has a population of 1.4 billion, with 4 million new cancer cases arising annually, but around 90 percent of innovative and patented cancer drugs in China are imported, and highly-priced," he said.

"China accounted for approximately 30 percent of the cumulative growth in world GDP since 2010; absent this support, there is a very good chance that the world would have lapsed back into renewed global recession in the aftermath of the financial crisis," he said.