Children play at the newly-built Angry Birds theme park in Haining, east China's Zhejiang Province, Sept. 7, 2013. The Angry Birds theme park, the first of its kind in China, underwent a soft opening on Saturday and is expected to officially open to the public in October. Angry Birds, created by the Finland-based Rovio Entertainment, is a popular game for smartphones and tablet computers. (Xinhua/Han Chuanhao)