1992年,我国确立了载人航天三步走的发展战略。神舟一号到神舟六号的成功发射,实现了第一步“发射载人飞船”的发展战略。神舟七号实现了航天员出舱活动的技术突破,拉开了第二步“空间实验室阶段”的序幕;“天宫一号”交会对接任务,将第二步发展战略继续向前推进。第三步,我国将在2016年发射“天宫二号”空间实验室,在2020年前建立60吨级载人空间 In 1992, China established a three-step development strategy for manned space flight. The successful launch of Shenzhou-1 and Shenzhou-6 has realized the development strategy of “launching manned spacecraft” in the first step. Shenzhou VII to achieve the astronaut spacecraft technology breakthrough, opened the second phase “space laboratory phase ” of the curtain; “Tiangong One ” rendezvous and docking mission, the second step development strategy continues to To advance. In the third step, China will launch the “Tiangong 2” space laboratory in 2016 to establish a 60-tonned manned space by 2020