Excuse me, the ancient forms of advertising, one is called cover and the other is called flag. What's the difference between them? Ask.

The cover is a piece of cloth on a bamboo pole, which is often used for travelling in the square and divination. The flag stands on the ground and is fixed with a stone pier, which is usually used in shops.

If there is any difference, it is big, small, long, short, fixed and mobile.