A kite flies over an artwork of sand sculpture during a tourism promotion event held at the scenery spot of the Qinghai Lake in northwest China`s Qinghai Province, June 15, 2013. (Xinhua/Zhang Hongxiang)

　　Visitors view an artwork of sand sculpture during a tourism promotion event held at the scenery spot of the Qinghai Lake in northwest China`s Qinghai Province, June 15, 2013. (Xinhua/Zhang Hongxiang)

　　Visitors pass by an artwork of sand sculpture during a tourism promotion event held at the scenery spot of the Qinghai Lake in northwest China`s Qinghai Province, June 15, 2013. (Xinhua/Zhang Hongxiang)