Legal analysis: it is legal to promote fire protection products by mistake. First of all, the state encourages fire protection publicity and training. The state supports fire propaganda, but fire instructors only rely on lectures, which is no different from public welfare. The nature of the work is legal. Although the product will be promoted in the end, this is not a mandatory promotion, not to say that you have to buy it. This is just a way to increase your income. However, as a lecturer, you must be professional. You should make others think that you are just a potential seller, not a salesman. If you don't have enough professional knowledge, others will think you are selling something.

Legal basis: Article 10 of People's Republic of China (PRC) Labor Law The state creates employment conditions and expands employment opportunities by promoting economic and social development.

The state encourages enterprises, institutions and social organizations to set up industries or expand their operations within the scope prescribed by laws and administrative regulations to increase employment.

The state supports laborers to organize themselves voluntarily for employment and engage in self-employment to achieve employment.