Paste is cut into bricks by a machine, the most advanced piece of equipment in an old brick kiln in Yuan'an county, Central China's Hubei province, March 24, 2015. The kiln makes bricks in the traditional way, including fetching clay from mountain, turning the paste into standardized bricks, and baking them for three days and nights. Significant amounts of dust are produced when the bricks are removed to cool, while the temperature in the kiln can reach about 60 degrees Celsius. [Photo/China News Service]