An actress performs drama on a temple stage of Wutai Mountain in north China's Shanxi province, Nov. 3, 2011. China's performing stage is an essential part of traditional Chinese architecture. Most well-preserved ancient stages were built in Ming Dynasty (1368-1644) and Qing Dynasty (1644-1911). It generally consists of indoor and outdoor types. The main construction materials are wood, brick and stone. Its unique acoustics property has become an important object for experts. [Photo by Wang Song/Xinhua]