An actor performs an aria of Shaanxi opera at the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)

Zhang Bo, an actor from an opera institute of Shaanxi Provicne, performs Shaanxi opera at the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)

An actor performs an aria of Shaanxi opera at the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)

An actress performs Gansu's local drama "Longju" at the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)

An actress performs an aria of Shaanxi opera at the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)

Actors perform on the stage of the Gansu Theater in Lanzhou, capital of northwest China's Gansu Province, Nov. 6, 2012. A performance was held here Tuesday night to celebrate the opening of an eight-day Shaanxi opera art festival. Shaanxi Opera, commonly known as Qinqiang, is the oldest of all the Chinese operas that are still in existence today. (Xinhua/Liang Qiang)