Only after passing the exam. The initial training time for police officers who have just joined the police force is 1-3 months, and they are all basic business knowledge. Only after passing the examination will they have police uniforms. After passing the exam, you can go to work. You must dress for work, that is, wear a police uniform. Newly hired policemen have a one-year probation period. During the probation period, they wore a first-class police rank, that is, two curved thick sticks without stars. After passing the examination, they shall be appointed and graded, and may be awarded the rank of superintendent by the ministries and agencies.