"What's the need for 50,000 km of high-speed rail?" "Why a 55 km bridge over the sea?" "Are robots coming for your job?" ... Well, questions keep coming. So do the breakthroughs. #CHINA #Development #Technology #AI #SpaceExploration #HighSpeedRail #EV Produced by Xinhua Global Service 来源:Xinhua 编辑:刘颖思