The first Qinghai-Tibet train from China's capital Beijing to Tibet's capital Lhasa has arrived after a two-day 1,140km (710-mile) journey. The journey is said to be the world's highest train journey reaching a massive 5,072m (16,000 feet)- oxygen is pumped into the carriages to help passengers deal with the high altitudes. China says the line will bring major opportunities to a poor region, that will “hugely boost local development and benefit the local people”, but critics fear it will be used by China to assert its control over an already contested border region and that the railway line threatens not only the delicate Himalayan environment, but also the ancient Tibetan culture.