This year, China's climate is abnormal. Frequent sandstorm happened in the spring and the heat waves occurred in summer. In addition, drought last for a long time in many places of the country...

China is a country with very little and unevenly distributed freshwater resource. The per capita water resource is 2,400 cubic meters, 1/4 of that in the world. Rainfall is the basic water resource of China. The long drought is caused by the abnormal climate, including the continual shortage of rainfall, high temperature and frequent gales...