The Philadelphia Orchestra stages a concert at Hangzhou Grand Theater on May 31, 2013, under the baton of conductor Donald Runnicles. The orchestra is one of the top symphony orchestras in the world. It was asked in 1973 by then US president Richard Nixon to perform in China. The orchestra's Hangzhou concert is the first of a series of shows to mark the 40th anniversary of its first performance in China. [Photo by Li Zhong/Asianewsphoto]