Singers rehearse the Yellow River Cantata in Shanghai, east China, Sept. 18, 2009. The cantata, with participation of more than 22,000 people, will be staged with live broadcasting in 10 provinces and regions on Saturday to commemorate the 70th anniversary of the cantata composed by Xian Xinghai, a famous Chinese composer, and the 60th birthday of the People's Republic of China.(Xinhua Photo)