Petrol processing and refinement products are major energy suppliers. It also provides most organic chemical raw materials, which are related to modern industrial society. ChemChina has 5 refineries with combined annual crude oil processing capacity of 20 million tons. It has the first domestic 500,000-t/a DCC devices and first 500,000 t/a CPP device with "petroleum start and chemical end" techniques and provides intermediates and raw materials for new chemical materials and specialty chemicals.