Tourists visit the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]
![Tourists visit the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090422/000bcdb95f1d0b58afa40c.jpg "Tourists visit the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2009. [Purbu Zhaxi/Xinhua]")