Chemical intermediates, referred to as intermediates for short, are intermediate products that use coal tar or petroleum products as raw materials to manufacture dyes, pesticides, medicines, resins, additives, plasticizers, etc. According to the national conditions and the needs of national economic development, my country divides fine chemicals into pesticides, dyes, coatings, pigments, reagents and high-purity substances, chemicals for information, food and feed additives, adhesives, catalysts and various auxiliaries 11 categories, such as chemicals and daily chemicals, and functional polymers in high-molecular polymers. Our innovations focus on downstream C1-C4 and provide intermediate species of heteroatoms such as N, P, Si, F, etc.