Located 5 kilometers south of Dunhuang, a county-level city, in the Singing Sand (Mingsha) Mountains, the Crescent Moon Spring is quite literally an oasis in the desert. [Photo/silkroadexpo.gogansu.com]

Snow scenery of the Crescent Moon Spring [Photo/silkroadexpo.gogansu.com]

Located 5 kilometers south of Dunhuang, a county-level city, in the Singing Sand (Mingsha) Mountains, the Crescent Moon Spring is quite literally an oasis in the desert. [Photo/silkroadexpo.gogansu.com]

The ruins of Yumen Pass, a strategic point on the ancient Silk Road [Photo/silkroadexpo.gogansu.com]

The poplar tree, or huyang, is locally known as the "hero tree in desert". [Photo/silkroadexpo.gogansu.com]

The poplar tree, or huyang, is locally known as the "hero tree in desert". [Photo/silkroadexpo.gogansu.com]