General business items are: technical development and sales of analytical reagents (excluding national restricted items); laboratory testing of consumer products and environmental substances (items that require qualifications can only be operated after obtaining qualification licenses); technical consultation on measuring instruments and equipment and sales, sales of electronic materials and other domestic trade (the above does not include specialized, exclusively controlled, exclusive products and restricted items). , the licensed business items are: production of analytical reagents; import and export of goods. (Projects that require approval according to law can only be carried out with the approval of relevant departments. Specific business projects shall be subject to the approval documents or licenses of relevant departments)