What is the requirement for probation period?

Employers can require a probation period in the employment contract. However, the probation period should not exceed statutory period and it should be in correspondence with the length of the contract term. Generally speaking, the probation period should not exceed 6 months at most. During this period, either contracted party may terminate the contract without upfront notice. After probation period, the notice period of termination by either party should be one month.