銆€銆€Actors and actresses perform in musical "Mamma Mia!" at the Gansu Grand Theater in Lanzhou, capital of northwest China's Gansu Province, Dec. 26, 2012. The Chinese version of classic musical "Mamma Mia!" was staged in Gansu with six performances starting from Dec. 25. Over 42 million people across the world have seen the musical since the original London production opened in 1999. (Xinhua/Zhang Meng)