Legal analysis: It is not illegal for public welfare to publicize and print business advertisements. According to the donation law for public welfare, the use of donated property should respect the wishes of donors and conform to public welfare purposes, and the donated property should not be used for other purposes. The donated property of public welfare social organizations and its added value are public property, which is protected by state laws, and no unit or individual may occupy, misappropriate or damage it.

Legal basis: Law of the People's Republic of China on Donation to Public Welfare

Article 9 Natural persons, legal persons or other organizations may choose public welfare social organizations and public welfare non-profit institutions that meet their donation wishes to make donations. The donated property shall be the legal property that it has the right to dispose of.

article 1 public welfare social organizations and public welfare non-profit institutions may accept donations in accordance with this law.

the public welfare social organizations mentioned in this law refer to foundations, charitable organizations and other social organizations established according to law with the purpose of developing public welfare undertakings.

the public welfare and non-profit institutions mentioned in this law refer to non-profit educational institutions, scientific research institutions, medical and health institutions, social public cultural institutions, social public sports institutions and social welfare institutions established according to law and engaged in public welfare undertakings.