Tourists ride horses along the boundary river between China and Russia in Hulun Buir grassland, north China's Inner Mongolia Autonomous Region, on Aug. 12, 2009. The beautiful scenery of the vast grassland, forests, rivers and lakes, as well as the unique customs of the Mongolian ethnic group, have attracted a great number of tourists at home and abroad to Hulun Buir grassland since mid June this year. [Xinhua/Ma Ping]