Tourists pose for photos in front of the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, April 21, 2014. As spring comes and relieves the plateau from coldness, the region is expected to see more tourists. The number of the tourists traveling to Tibet Autonomous Region in the first three months of this year increased by over 20 percent from the same period last year, according to local tourism bureau. (Xinhua/Purbu Zhaxi)