75% of China's electricity comes from coal and only 2.5% from oil. Because most of the oil is drunk by cars and the cost of transporting coal is high, at least half of China's railway capacity is used to transport coal. At present, the coal inventory of many thermal power plants can not last for more than a week, once there is a problem in railway transportation, the direct consequence is to pull the gate.
intended to be emphasized by the above text?
There are some disadvantages in the structure of electric power production which is too dependent on coal.