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Cave of the Hidden Scriptures Tibetan Buddhism Mogao Grottoes Wang Yuanzhuo Dunhuang cultural relic
12-19
Mogao Grottoes Repair Dunhuang Wang Yuanzhuo cultural relic Qing Dynasty
12-18
Wang Yuanzhuo cave Mogao Grottoes cultural relic Cave of the Hidden Scriptures Yang Heqing
12-17