Tourists line for visiting the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]
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![Tourists line for visiting the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090422/000bcdb95f1d0b58af7c0a.jpg "Tourists line for visiting the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]")