Is it legal for equestrian magazines to be punished for advertising without a serial number?

Equestrian magazine can't be found on the news publishing website, so Equestrian magazine doesn't have a CN number, and it's unknown whether it has a DM number.

First, periodicals with CN number need an advertising license to publish advertisements, otherwise it is illegal.

Second, other journals, such as those with DM serial numbers, can publish legal advertisements.

Three, internal journals have no CN number and DM number, but they have quasi-printing numbers, and advertising is not allowed.

4. Illegal publications have no CN number, no DM number and no quasi-printing number. All activities are illegal, and of course advertisements are illegal!

In addition, judging from the website of Equestrian magazine, although Equestrian doesn't have a cn number, its content doesn't look like a DM periodical, so this periodical room is illegally published, and it is also illegal to advertise on it!