The file photo taken in 1959 shows the new look of Parkhor Street after renovation, in Lhasa, capital of southwest China's Tibet Autonomous Region. (Xinhua/Wang Chunde)

The file photo issued on August 28, 1985 shows a market on Parkhor Street in 1980's, in Lhasa, capital of southwest China's Tibet Autonomous Region.(Xinhua/Chen Xuesi)

Photo taken on March 31, 2011 shows the crowded Parkhor West Street, in Lhasa, capital of southwest China's Tibet Autonomous Region. (Xinhua/Jiang Hongjing)