Complex sentence: China's decision to go for UHV transmission is based on the fact that energy resources are far away from the load centers: majority of hydropower resources are in west, coal in northwest, but huge loadings are in east and south.
Split into simpler sentences: China's decision to go for UHV transmission is based on the fact that energy resources are far away from the load centers. The majority of the hydropower resources are in the west, and coal is in the northwest, but huge loadings are in the east and south.