Photo taken on May 13, 2013, shows varicolored tulips blooming in Napa Grassland, Shangri-La County, Yunnan province. [Xinhua]

Photo taken on May 13, 2013, shows a plane landing close to a field of varicolored tulips in Napa Grassland, Shangri-La County, Yunnan province. [Xinhua]

Photo taken on May 13, 2013, shows varicolored tulips blooming in Napa Grassland, Shangri-La County, Yunnan province. [Xinhua]

(Editors: Ryan Li, Minnie Mao)