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He pointed out that the Chang'e-4 mission, by adhering to independent, collaborative and open innovations, has realized the first-ever patrol and exploration on the far side of the moon by a human spacecraft and engraved Chinese "footprints" there for the first time.
"It must endure temperature changes of more than 300 degrees centigrade. We conducted countless experiments for that."
By the end of 2018, there were about 40 Chinese airports that supported digital boarding passes.
Hua said that the United States recently smeared and made groundless accusations against China on issues including debts, trade, the South China Sea, international rules and religious freedom, "yet facts have refuted all those accusations."
It took more than 40 years for Boeing to deliver the first batch of 1,000 airplanes to China, but only five years to deliver the second batch of 1,000 aircraft, and the speed of delivery of the 2,000th plane testifies that the Chinese market, including air services, has been expanding rapidly alongside its economic development, Wang said.
来源：资阳报