Cui Liuxia (R) and her sister do farm work at the vegetable garden on their roof at Xigou village of Xihe town in Jincheng City, north China's Shanxi Province, July 9, 2011. Roof gardens, popular in recent years, can offer fresh food for personal use as well as cool down the house in hot summer. (Xinhua/Chen Yuanzi)
People visit a vegetable garden on the roof of a local family at Xigou village of Xihe town in Jincheng City, north China's Shanxi Province, July 9, 2011. Roof gardens, popular in recent years, can offer fresh food for personal use as well as cool down the house in hot summer. (Xinhua/Chen Yuanzi)
