LHASA, May 26( Xinhua)--An outdoor opera based on the life of a Tang Dynasty( 618-907) princess kicked off its tenth-year performance on Thursday in southwest China's Tibet Autonomous Region." Princess Wencheng" was first staged in Lhasa, the capital of Tibet, in 2013, and has been a hit since then, alongside other highlights such as the Potala Palace and Jokhang Temple. The 90-minute show tells the story of Princess Wencheng, who came all the way from Chang'an( today's city of Xi'an) to marry T