I am not a legal expert, but I can give you some information. There is a section in the computer newspaper that teaches you how to get big profits with small investment. Very detailed, including budget and legal related things. One issue is about DIYT-shirts. If there is a big legal problem, he will not publish it. Computer News is a famous newspaper. I don't think he will smash his own signboard, and it is said that many big ones are made into chain stores. It doesn't matter. You shouldn't have anything to do with it.
And as far as my life is concerned, there are many trademarks such as Master Kong, Want Want and Super Girl in the canteen or hair salon at the door. These things are out of control. Please feel free to open them.