At present, there is no such thing as becoming a full member. They are all contract employees, and there are no unexpected situations and major mistakes in their work. After the internship expires, the labor contract is directly signed by the personnel department, and there is no need for re-examination.
Generally, contracts are signed once every three years. After the expiration of three years, a comprehensive evaluation will be conducted, and a new three-year labor contract will be signed after soliciting opinions from all departments without objection.