Four roller coasters are on a trial run without load in the Joy Land of Yuehai National Wetland Park in Yinchuan, capital of Ningxia Hui Autonomous Region, August 1, 2011. Covering an area of 280,000 square meters, the Joy Land, slated to open on August 18, accommodates 19 recreational facilities including a ferris wheel and rockets bungee jumping. [Photo: NXNews.net]