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"By setting up facial recognition devices at the airport, travelers will go though rounds of security screening with minimal, if any, noticeable disruption," he said. "It is estimated that about 50 percent of all airports in China will use facial recognition at all points of contact by 2021."

"China has been the only country that is able to manufacture a wide range of industrial products. In fact, China was the world's largest manufacturing country for over 220 out of 500 kinds of major industrial products," he said.

"But other than that, everyone was amazed by the deserts, the mountains, the culture and the food. There was absolutely no disagreement on how delicious the lamb, noodles or naan bread were," his wife, Ute, added, while their son and daughter chuckled in the background.

"Changes do happen. More people in Hong Kong can now speak Mandarin. Exchange activities also have increased significantly, especially among young people," Tung said. "The region's major trade partners also turned from the United States and European countries to the mainland."

"China can stop providing subsidies for wind power by 2020, as the price of wind-based electricity is already relatively low. That would make it more competitive compared with electricity generated from other sources," said Han Xiaoping, chief information officer of China Energy Net Consulting Co Ltd.