One day, Yadan consulting room into a young man.
一天，雅丹的咨询室里走进一个年轻人。
Song Yadan, a senior student from Zhejiang Forestry College has recently become a legend.
浙江林学院大四女生宋雅丹最近成为传奇人物。
Why Yadan landform known as the Demon Castle? Where dose the largest and most typical Yadan landform located of Qinghai?
雅丹地貌为何被称为魔鬼城？青海最大最典型的雅丹地貌主要分布在哪里？
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