The national flag is not a national patent, but there are strict regulations on the production, production, sales, and use of the national flag, and it cannot be done casually.
The flag is the symbol of a country. There are strict regulations on the form, color, position and proportion of each part of the national flag. The production of the national flag must be carried out in accordance with regulations. If you want to mass-produce national flags, you must first go through the formalities with the provincial market supervision department, and when relevant conditions are met, a license can be issued before production and sale. Otherwise it is illegal.