Performance appraisal belongs to the labor system and company management system, and the corresponding system can only take effect after employees fully publicize and sign it. The system unilaterally formulated by the employer is not binding on the workers, and double economic compensation shall be paid for the illegal termination of the labor contract. Article 40 of the Labor Contract Law is under any of the following circumstances, the employer may terminate the labor contract after notifying the employee in writing 30 days in advance or paying the employee an extra month's salary:

(1) The employee is sick or injured non-work-related, and cannot engage in the original job or other jobs arranged by the employer after the prescribed medical treatment period expires;

(two) the laborer is not competent for the job, and he is still not competent for the job after training or adjusting his post;

(3) The objective conditions on which the labor contract was concluded have changed greatly, which makes it impossible to perform the labor contract, and the employer and the employee cannot reach an agreement on changing the contents of the labor contract through consultation. Forty-seventh economic compensation shall be paid according to the standard of one month's salary for each full year of work in the unit. For more than six months but less than one year, it shall be counted as one year; If it is less than six months, economic compensation of half a month's salary shall be paid to the workers. If the employer terminates or terminates the labor contract in violation of the provisions of this Law, and the employee requests to continue to perform the labor contract, the employer shall continue to perform it; If the employee does not request to continue to perform the labor contract or the labor contract cannot be continued, the employer shall pay economic compensation according to the actual working years of the employee. If the employing unit dissolves or terminates the labor contract in violation of the provisions of this Law, it shall pay compensation to the laborer at twice the economic compensation standard stipulated in Article 47 of this Law.