Visitors tour in the scenic area of the 2014 International Horticultural Exposition in Qingdao, east China's Shandong Province, April 5, 2014. The scenic area of the expo was put in trial operation on Saturday, attracting about 30,000 visitors. The expo will officially kick off on April 25.(Xinhua/Li Ziheng)

Visitors tour in the scenic area of the 2014 International Horticultural Exposition in Qingdao, east China's Shandong Province, April 5, 2014. The scenic area of the expo was put in trial operation on Saturday, attracting about 30,000 visitors. The expo will officially kick off on April 25.(Xinhua/Li Ziheng)