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"For example, tourists usually choose nearby destinations for road trips, such as suburbs or outskirts of their city, during three-day holidays, such as Tomb Sweeping Day and May Day. But during seven-day holidays, such as Spring Festival and National Day, people like to travel farther," he said.

"Fighters should have been scrambled to follow MH370 as has been done many times around the world-including Australia-when a plane goes 'silent'."

"Gansu has long been a stronghold on the ancient Silk Road. It connects East and West and provides an important path for cultural and economic exchanges," said Wang Zhile, a senior researcher at the Chinese Academy of International Trade and Economic Cooperation in Beijing.

"For the first time, China's fossil fuel vehicles sales dropped in 2018. The proportion of new energy vehicles in total vehicles sales increased dramatically, reaching about 4.5 percent in 2018," he noted.

"For an emerging company like us, if we don't invest heavily in R&D, it will be hard to sell our products on the market," Wu said.