4月20日19时41分，搭载着天舟一号货运飞船的长征七号遥二运载火箭，在我国文昌航天发射场点火发射，约596秒后，飞船与火箭成功分离，进入预定轨道，发射取得圆满成功。[新华社 杨冠宇 摄]
China's first cargo spacecraft Tianzhou-1, atop a Long March-7 Y2 carrier rocket, blasts off from Wenchang Space Launch Center in south China's Hainan province, April 20, 2017. China declared the launch of Tianzhou-1 a success, as it entered designated orbit Thursday night, marking a crucial step for the country in building a space station by approximately 2022. (Xinhua/Yang Guanyu)