Three Tibetans who see the train for the first time in their lives smile happily while they are in a coach of a train in Lhasa of southwest China's Tibet Autonomous Region in this file photo taken on October 10, 2005. (Xinhua Photo)

Two Tibetan children smile near the train construction site in southwest China's Tibet Autonomous Region in this file photo taken on March 30, 2005. (Xinhua Photo)

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