Photo taken on March 31, 2013 shows the scenery of terraced fields in Zhongzhai Village of Yuanyang County, Honghe Hani-Yi Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Chen Haining)

Villagers of Hani ethnic group walk on their way to do farm work in the fields in Xinjie Township of Yuanyang County, Honghe Hani-Yi Autonomous Prefecture, southwest China's Yunnan Province, March 31, 2013. (Xinhua/Chen Haining)

Photo taken on March 31, 2013 shows the scenery of terraced fields in Xinjie Township of Yuanyang County, Honghe Hani-Yi Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Chen Haining)

Photo taken on March 31, 2013 shows the scenery of terraced fields in Zhongzhai Village of Yuanyang County, Honghe Hani-Yi Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Chen Haining)