Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]

Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]

Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]

Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]

Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]

Hailed as the "sky road of electricity", the Qinghai-Tibet AC/DC Network Project stretches from Xining in the east to Lhasa in the west with a total length of 1,774 kilometers. Built on the world’s highest and coldest region, it is the largest of its kind so far. Thanks to the hard work of 30,000 electricians who participate in the construction, the project is completed one year ahead of time. Those workers overcome four problems altogether, including strong altitude reaction, fragile ecological environment, frozen soil as well as technical difficulty. The project will be connected with Tibet Grid and Northwest Grid, solving the power shortage problems and optimizing electric supply system in Tibet. [Photo/China Tibet Online]