1. It can be proved that the employee does not meet the employment conditions during the probation period.
2. The employee seriously violates the rules and regulations of the employer.
3. The employee seriously neglects his duty and engages in malpractices for selfish ends, causing great losses to his unit.
4. Employees are investigated for criminal responsibility according to law.
5. The unit encounters difficulties in production and operation and meets the conditions for economic layoffs.