Yes, but the sideline options are limited. You can't do everything. Once you touch it, you will be punished, and in serious cases, you will be expelled. Civil servants are not allowed to register companies, which is absolutely forbidden. Of course, they can't start a company in partnership with others, including shares, even if they hang up their names. Civil servants are also not allowed to do business to make money. However, it is ok for civil servants to invest in financial management, such as buying a house, stocks and funds, which are all legal income.

Legal basis: Article 44 of the Civil Service Law of People's Republic of China (PRC). If a civil servant takes a part-time job outside the office because of work needs, it shall be approved by the relevant authorities and shall not receive part-time remuneration. Article 88 A civil servant shall be dismissed under any of the following circumstances: (1) He is determined to be incompetent in the annual assessment for two consecutive years; (two) unable to do the current job, and do not accept other arrangements; (three) due to the adjustment, cancellation, merger or reduction of the staffing of this organ, the work needs to be adjusted, and I refuse to make reasonable arrangements; (4) Failing to perform the obligations of civil servants, failing to abide by the laws and disciplines of civil servants, failing to change after education, being unfit to continue working in government organs, and being dismissed; (5) Absenteeism or going out on business, and failing to return for more than fifteen days or one year without justifiable reasons.