Tourists visit Crescent Spring and Mingsha Mountain scenic spot in the Gobi desert in Dunhuang City, Northwest China's Gansu Province in the second half of June. With of a vast expanse of sand dunes, Mingsha Mountain, or "Singing Sand," is famous for its desert scenery and the mysterious sound made by wind blowing over its surface. The area’s blue sky, white clouds and rolling sands are particularly appealing to tourists. (Photo: China News Service/Wang Binyin)

Tourists visit Crescent Spring and Mingsha Mountain scenic spot in the Gobi desert in Dunhuang City, Northwest China's Gansu Province in the second half of June. With of a vast expanse of sand dunes, Mingsha Mountain, or "Singing Sand," is famous for its desert scenery and the mysterious sound made by wind blowing over its surface. The area’s blue sky, white clouds and rolling sands are particularly appealing to tourists. (Photo: China News Service/Wang Binyin)

Tourists visit Crescent Spring and Mingsha Mountain scenic spot in the Gobi desert in Dunhuang City, Northwest China's Gansu Province in the second half of June. With of a vast expanse of sand dunes, Mingsha Mountain, or "Singing Sand," is famous for its desert scenery and the mysterious sound made by wind blowing over its surface. The area’s blue sky, white clouds and rolling sands are particularly appealing to tourists. (Photo: China News Service/Wang Binyin)

Tourists visit Crescent Spring and Mingsha Mountain scenic spot in the Gobi desert in Dunhuang City, Northwest China's Gansu Province in the second half of June. With of a vast expanse of sand dunes, Mingsha Mountain, or "Singing Sand," is famous for its desert scenery and the mysterious sound made by wind blowing over its surface. The area’s blue sky, white clouds and rolling sands are particularly appealing to tourists. (Photo: China News Service/Wang Binyin)

Tourists visit Crescent Spring and Mingsha Mountain scenic spot in the Gobi desert in Dunhuang City, Northwest China's Gansu Province in the second half of June. With of a vast expanse of sand dunes, Mingsha Mountain, or "Singing Sand," is famous for its desert scenery and the mysterious sound made by wind blowing over its surface. The area’s blue sky, white clouds and rolling sands are particularly appealing to tourists. (Photo: China News Service/Wang Binyin)