The N in the registration conditions of "engaged in economic and legal work for n years" is measured by the Regulations of People's Republic of China (PRC) Municipality on Certified Tax Agents. Citizens of People's Republic of China (PRC), who abide by the law and meet one of the following conditions, may apply for the qualification examination for certified tax agents:

1. After graduating from an economic or legal college or a non-economic or legal college, he has been engaged in economic and legal work for 6 years; After graduating from non-economic and legal colleges, he worked in economics and law for 8 years.

2. After obtaining a double bachelor's degree in economics and law or a second bachelor's degree in non-economics and law or a graduate class, he has been engaged in economics and law for 4 years.

3. After graduating from the second bachelor's degree or postgraduate class in economics and law, or obtaining a master's degree in non-economics and law, he has worked in economics and law for 2 years.

4. Engaged in economic law work after obtaining a master's degree in economic law 1 year.

5. Get a doctorate in economics and law.

6. Before the implementation of the professional and technical qualification examination in the whole country, those who evaluated and hired intermediate professional positions such as economics, accounting, statistics, auditing and law in accordance with the relevant provisions of the state or participated in the national unified examination, obtained intermediate professional and technical qualifications such as economics, accounting, statistics and auditing, and engaged in tax agency business for one year can sign up for the examination of all subjects of certified tax agents.