Yes, but enterprises and industries related to the original business cannot. For example, it used to be the tax bureau, so it is impossible to open a tax agency after retirement. If there is any violation, the competent department of civil servants at the same level of the original organ shall generally order it to make corrections within a time limit; If no correction is made within the time limit, the illegal income of the person during his tenure shall be confiscated, the receiving unit shall be ordered to clear the person, and according to the seriousness of the case, the receiving unit shall be fined 1 times but not more than 5 times the illegal income of the punished person.

According to the relevant laws and regulations, a resigned civil servant or a retired civil servant who used to be a leading member or a leading position at or above the county level shall not be employed by an enterprise or other profit-making organization directly related to the original job within three years after leaving the job, and other civil servants shall not engage in profit-making activities directly related to the original job within two years after leaving the job.

To sum up, retired public officials can run enterprises through business, but there are restrictions. Civil servants who resign or retire, former leading members, civil servants who hold leading positions at or above the county level within three years after leaving office, and civil servants who hold other positions within two years after leaving office are not allowed to work in enterprises or other profit-making organizations directly related to their original jobs, and are not allowed to engage in profit-making activities directly related to their original jobs.

Legal basis:

People's Republic of China (PRC) civil servant law

Article 107

Civil servants who resign or retire, former leading members, civil servants who hold leading positions at or above the county level within three years after leaving office, and civil servants who hold other positions within two years after leaving office are not allowed to work in enterprises or other profit-making organizations directly related to their original jobs, and are not allowed to engage in profit-making activities directly related to their original jobs.

If a civil servant resigns or retires in violation of the provisions of the preceding paragraph, the competent department of civil servants at the same level of the original organ shall order him to make corrections within a time limit; If it fails to make corrections within the time limit, the market supervision department at or above the county level shall confiscate the illegal income of the person during his employment, order the receiving unit to repel the person, and impose a fine of 1 times and less than 5 times of the illegal income of the punished person on the receiving unit according to the seriousness of the case.