7. Material certification records, exception handling records, supplier management records, quality control realization records mentioned in the audit description are not missing.
8. Structural design, circuit design, component selection, product BOM, core materials, self-production, assembly process design, production and assembly arrangements, packaging and wire arrangements, after-sales service all own.
9. There is a list of instruments and equipments, and the instruments and equipments in the list can be checked at the site, and the precision of each instrument and equipment meets the requirements of post process, and each instrument and equipment has maintenance records.