载入飞船完成飞行任务后，返回着陆是飞行的最后一环，据统计也是事故多发阶段。
Landing is the last stage of reentry of manned spacecraft after the flight mission has been completed.
依照报告，第一个阶段是2007年之前一个环月球轨道运行任务，使用DFH - 3卫星平台。
According to the report, the first stage is a moon orbiting mission by 2007, using the DFH-3 satellite platform.
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