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"Combustion engines will remain the backbone of our CO2 goals as well as our financial performance over a considerable period of time," he said.

"China's regional aviation market is still in its initial stage of development. Most plateau airports globally are located in western China, and China is a great market with rich opportunities for the growth of the regional aviation sector," said Li Guijin, a professor at the Civil Aviation Management Institute of China.

"Chinese people are not only paying more attention to their health but also are more willing to pay for better experiences," said Tang, adding that those born in the 1970s and 1980s are his main client base.

"Cross-border e-commerce improves logistics efficiency and saves time," Li said. "Vietnamese customers can place orders on popular local shopping sites like Lazada and Shopee. It takes only one day to transport our goods from Hekou to Hanoi, and at most three days to reach Ho Chi Minh City.

"China's approach is borne out of global responsibility and based upon a Chinese philosophy of self-interest that the world is safer and more secure if all nations prosper. Sharing is a byword for China's trading philosophy," Perry said.