Since 1992, Yunnan Astronomical Observatory has started site testing in northwest of Yunnan Province.

自1992年起云南天文台开始了在云南省西北部的天文选址。

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Since 1992, Yunnan Astronomical Observatory has started site testing in northwest of Yunnan Province.

自1992年起云南天文台开始了在云南省西北部的天文选址。

youdao