Because ordinary masks can print advertisements as long as they do not affect the use function. But disposable medical masks are not allowed to advertise.

Secondly, the advertising content should meet the national standards, that is, it is not allowed to publish content suspected of false functions, insulting the country and others, infringing others' trademarks, etc.

Only the advertisements on ordinary masks do not affect the use, which meets the national standards and is not illegal.

It is not illegal, but it will infringe masks, customize logo prints, one-time advertisements, design 3d printed materials for free, customize diy Jun 'an source protection masks, and undertake masks of various enterprises and institutions. ...