This standard specifies the technical requirements, test methods, inspection rules, labeling, packaging, transportation and storage of trace element water-soluble fertilizers. This standard applies to liquid or solid water-soluble fertilizers produced and sold within the territory of the People's Republic of China, made of copper, iron, manganese, zinc, boron, molybdenum trace elements in required proportions or made of a single trace element. This standard does not apply to fertilizers and chelated fertilizers that have mandatory national or industry standards.