翟 ㄓㄞ ˊ zhái 志 ㄓ ˋ zhì 刚 ㄍㄤ gāng 翟 ㄓㄞ ˊ zhái 志 ㄓ ˋ zhì 剛 ㄍㄤ gāng Zhai Zhigang (1966-), Chinese astronaut