Guangdi Chemical occupies an area of about 100,000 square meters. The first-phase project has set up sodium hydrosulfite （sodium dithionite） production plants with an annual capacity of 50,000 tons, anhydrous sodium sulfite production plants with an annual capacity of 7,500 tons, sulfur dioxide production plants with an annual capacity of 40,000 tons, sodium pyrosulfite production plants with an annual capacity of 25,000 tons as well as supporting facilities for public utility, safety and environmental protection, and fire prevention.