Kunqu Opera performers sing on stage in Hangzhou, capital of east China's Zhejiang Province, Oct. 10, 2011. Kunqu Opera, one of the oldest extant forms of the Chinese opera which dates back more than 600 years, was listed by the United Nations Educational, Scientific and Cultural Organization (UNESCO) as a "Masterpiece of Oral and Intangible Heritage" in 2001. [Xinhua/Feng Yuan]