41..Children are seen during break time at the Dongzhong (literally meaning "in cave") primary school at a Miao village in Ziyun county, southwest China's Guizhou province, November 14, 2007. The school is built in a huge, aircraft hangar-sized natural cave, carved out of a mountain over thousands of years by wind, water and seismic shifts. 43.. Children play during break time at the Dongzhong (literally meaning "in cave") primary school at a Miao village in Ziyun county, southwest China's Guizhou province, November 14, 2007. The school is built in a huge, aircraft hangar-sized natural cave, carved out of a mountain over thousands of years by wind, water and seismic shifts. 44.. A general view 37.. Children attend class 38.. Children attend class 39.. Two children play basketball at the playground 40.. Children attend class http://www.reuters.com/news/pictures/slideshow?collectionId=1291#a=4 REUTERS/China Daily