The advertising law says that there must be no acts that insult religious beliefs and national dignity. The national flag on the clothes is obviously to show that there is a national embodiment in the heart. As for the national flag law, it is also for this purpose.
It is illegal to carry out the following acts: urinating on clothes in public, urinating, spitting, tearing clothes, and deliberately saying that it is China's.
Strictly speaking, there should be no activities such as printing, embroidering and drawing national flags on clothes, ornaments, faces and arms to show solemnity. After all, clothes can be thrown away