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一、背景材料中国载人航天工程正式起步于1992年.经过7年的努力,1999年11月20日6时30分在酒泉卫星发射中心新建成的载人飞船发射场,中国第一艘试验飞船由新研制的长征二号F运载火箭发射升空,并准确进入轨道.经过21小时的轨道飞行,飞船返回舱在15圈时进入返回轨道,并于21日凌晨3时41分准确着
I. Background China’s manned space project officially started in 1992. After 7 years of hard work, the newly launched manned spacecraft launch site at the Jiuquan Satellite Launch Center at 6:30 on November 20, 1999 was the first test in China. The spacecraft was launched by the newly developed Long March II F carrier rocket and entered the orbit accurately. After 21 hours of orbital flight, the spacecraft’s return capsule entered the return orbit at 15 laps and was accurately recorded at 3:41 am on the 21st.