Yǔhángyuán zài tàikōng zhōng shēnghuó le bàn nián.
The astronauts lived in space for half a year.
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China's astronauts are officially called 航天员 (hángtiānyuán), not 宇航员. The program is called 载人航天 (manned spaceflight). 杨利伟 (Yáng Lìwěi) was China's first person in space in 2003.