Whether the medical promotion and publicity services of individual industrial and commercial households are legal.

Contracts signed by individual industrial and commercial households are legal as long as they do not violate relevant laws.

Attachment: Article 52 of People's Republic of China (PRC) Contract Law:

In any of the following circumstances, the contract is invalid:

(1) One party enters into a contract by means of fraud or coercion, which harms the interests of the state;

(2) Malicious collusion that harms the interests of the state, the collective or a third party;

(3) Covering up illegal purposes in a legal form;

(4) damaging the public interest;

(5) Violating the mandatory provisions of laws and administrative regulations.