Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Zhagana, also known as "stone casket" in Tibetan, is a village in the northwest of Diebu County of Gannan Tibetan Autonomous Prefecture. The major landform in Zhagana is ancient glacial landform. (Photo/People's Daily Online)

Editor: Lucia Su