The Fenghuoshan Tunnel is the highest railway tunnel in the world. It is 1,338 metres (4,390 feet) long, and stands 4,905 meters (16,093 feet) above sea level. It is part of the recently-completed Qinghai–Tibet Railway, linking Qinghai

Qinghai

Qinghai ; Oirat Mongolian: ; ; Salar:) is a province of the People's Republic of China, named after Qinghai Lake...

 and Tibet

Tibet Autonomous Region

The Tibet Autonomous Region , Tibet or Xizang for short, also called the Xizang Autonomous Region is a province-level autonomous region of the People's Republic of China , created in 1965....

.

The tunnel is located in the western, sparsely populated part of Zadoi County

Zadoi County

Zadoi County is a county of Qinghai Province, China. It is under the administration of Yushu Tibetan Autonomous Prefecture....

, Qinghai

Qinghai

Qinghai ; Oirat Mongolian: ; ; Salar:) is a province of the People's Republic of China, named after Qinghai Lake...

 (the eastern edge of the Hoh Xil mountainous region between the Kunlun

Kunlun

Kunlun may refer to:*Kunlun fault, a geological fault on the northern side of the Tibetan Plateau*Kunlun Mountains, a long mountain chain in Asia*Kunlun Nu, a wuxia romance written by Pei Xing*Kunlun Pass, in Guangxi, China...

 and Tanggula mountain ranges).

"Fenghuoshan" is Chinese

Standard Mandarin

Standard Chinese or Modern Standard Chinese, also known as Mandarin or Putonghua, is the official language of the People's Republic of China and Republic of China , and is one of the four official languages of Singapore....

 for "Wind

Wind

Wind is the flow of gases on a large scale. On Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space...

 Volcano

Volcano

2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

".