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"Currently, autonomous vehicles will act as a supplement to our delivery staff, especially for late-night deliveries, as unmanned vehicles can work round-the-clock," he added.

"Considering the two accidents took place when newly delivered Boeing 737 Max 8s went down just minutes after taking off, they have some degree of similarity," the Civil Aviation Administration of China said in a statement on Monday.

"Culture export undertakes the responsibility of cultural communication between different countries and also bears economic significance, helping enhance the soft power of a country," he said.

"Chinese people do not make trouble, but we are not cowards when involved in trouble," Hua said, adding that any attempt to interfere in Hong Kong affairs and China's internal affairs is doomed to fail.

"Consumers are becoming accustomed to buying imported goods through the cross-border e-commerce channels, which has become very effective and complementary to the general trade model," said Zhang Tianbing, a consumer products and retail industry expert from Deloitte Asia Pacific.