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Last Updated: Saturday, 15 October 2005, 17:50 GMT 18:50 UK
China completes railway to Tibet
One of the giant viaducts linking the Qinghai-Tibet railway
Construction has involved several engineering feats
China has announced the completion of the first railway line to Tibet - one of the world's highest train routes.

The pan-Himalayan line climbs 5,072m (16,640ft) above sea level and runs across Tibet's snow-covered plateau - dubbed the roof of the world.

Trains travelling on the line will have to have carriages that are sealed like aircraft to protect passengers from altitude sickness.

The line is expected to take its first passengers next year.

The official Xinhua news agency said $3bn had been spent on the challenging 1,142km (710-mile) final section, after four years in construction.

Map showing the extent of the pan-Himalayan line
The workers who built the line had to breathe bottled oxygen in order to cope with the high altitudes.

China says the line will promote the development of impoverished Tibet.

The line links the Tibetan capital, Lhasa, with the north-western province of Qinghai.

But even before the railway line opens there are concerns about its future. The National Climate Centre said in June that rising temperatures would affect operation of the railway by 2050.

See the controversial China-Tibet railway

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