Students perform a waist drum dance at the Qiaoshan primary school in Huangling county of Yan'an city, Northwest China's Shaanxi province, April 4, 2011. Waist drum dancing is a traditional collective folk dance popular in northern Shaanxi. It has been added as part of the curriculum in the physical and music classes of Yan'an's primary and secondary schools. The local government made the decision to boost the importance of the dance, also an intangible cultural heritage, in the hope it will pass down to younger students. [Photo/Xinhua]