@BeijingAir we plan to visit Beijing with from 20th to 24th january .... what are the health risks if we visit all day historical sites ?
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BeijingAir Seems better now~Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BeijingAir 如此看来,不健康已经成为大多数时间的北京空气的状态了。Thanks. Twitter will use this to make your timeline better. UndoUndo
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