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Continue to Chat密云不老屯天文台 - 星空 银河 Miyun Bulaotun Observatory - Stary Sky and Galaxy https://billytang.com/photo/%e5%af%86%e4%ba%91%e4%b8%8d%e8%80%81%e5%b1%af%e5%a4%a9%e6%96%87%e5%8f%b0-%e6%98%9f%e7%a9%ba-%e9%93%b6%e6%b2%b3-miyun-bulaotun-observatory-stary-sky-and-galaxy/