Qualification certificates are often used, such as for units and enterprises, when signing agreements and contracts on engineering design, contracting, construction, decoration, construction, import and export, etc. Qualification certificates are also required for engaging in administrative director, engineering supervision, and quality inspection. Some special industries have special requirements from the state, such as the food industry, which requires a QS (Quality Safety) food production license, as well as the production of special equipment and audio-visual products. The state has special requirements, and qualification certification is particularly important here. For individuals, qualification certificates are also very important, such as working as doctors, pharmaceutical consultants, accountants, lawyers, psychological coaches, business negotiators, international investment consultants, teachers, and so on, all of which require specialized qualification certificates. Practicing qualifications are necessary for professional and technical personnel to work independently or start business in accordance with the law. They require qualification certificates of personal knowledge, skills, and abilities recognized and granted by the state. Professional technical and management personnel have qualification certificates. Therefore, various graduation theses and technical training certificates are often used as qualification certificates for job applications. It can be said that various professions nowadays require corresponding qualification certificates. In addition, when handling many matters, qualification certificates are often required. For example, when handling investment guarantees, the guarantee company will ask the lender to provide relevant qualification certificates for review according to the bank's requirements. Finally, the reviewed materials will be submitted to the bank, which will review and release the loan.