Performers perform Shaanxi opera at the Yisu Center for the Performing Arts in Xi'an, capital of northwest China's Shaanxi Province, Aug. 7, 2012. The Yisu troupe, which specialises in the local Shaanxi opera, also called qinqiang, as one of the country's oldest operatic society, celebrated its 100th anniversary Tuesday. (Xinhua/Li Yibo)

Performers perform Shaanxi opera at the Yisu Center for the Performing Arts in Xi'an, capital of northwest China's Shaanxi Province, Aug. 7, 2012. The Yisu troupe, which specialises in the local Shaanxi opera, also called qinqiang, as one of the country's oldest operatic society, celebrated its 100th anniversary Tuesday. (Xinhua/Li Yibo)

Performers perform Shaanxi opera at the Yisu Center for the Performing Arts in Xi'an, capital of northwest China's Shaanxi Province, Aug. 7, 2012. The Yisu troupe, which specialises in the local Shaanxi opera, also called qinqiang, as one of the country's oldest operatic society, celebrated its 100th anniversary Tuesday. (Xinhua/Li Yibo)

Performers perform Shaanxi opera at the Yisu Center for the Performing Arts in Xi'an, capital of northwest China's Shaanxi Province, Aug. 7, 2012. The Yisu troupe, which specialises in the local Shaanxi opera, also called qinqiang, as one of the country's oldest operatic society, celebrated its 100th anniversary Tuesday. (Xinhua/Li Yibo)

A performer performs Shaanxi opera at the Yisu Center for the Performing Arts in Xi'an, capital of northwest China's Shaanxi Province, Aug. 7, 2012. The Yisu troupe, which specialises in the local Shaanxi opera, also called qinqiang, as one of the country's oldest operatic society, celebrated its 100th anniversary Tuesday. (Xinhua/Li Yibo)