A performer joins in a Tibetan opera show on the occasion of the Shoton Festival in Lhasa, capital of Southwest China's Tibet autonomous region, Aug 22, 2012. Tibetan opera performances were given in the Norbu Lingka Palace and Dragon King Pool park during the seven-day Shoton Festival which started on Aug 17. The Tibetan opera, dated back to over 600 years ago, was put on the world heritage list of the oral and intangible heritage of humanity in 2009. [Photo/Xinhua]