Civil servants have two years of grassroots work experience, so can private enterprises, as long as you have proof materials, such as labor contracts.
You only need to meet the basic application conditions in the recruitment announcement and the specific post conditions in the position table, and you can choose a position that fully meets the recruitment conditions to apply for the exam.
For more information about the public examination, please refer to: Sichuan Zhonggong Education-Civil Service Examination Network.
If in doubt, please consult the public education enterprises in China.