Do National Day celebration banners and slogans need to be signed?

Generally speaking, National Day celebration banners and slogans need to be signed.

The signature usually includes promotional content and promotional units, which allows the audience to know the specific content and source of information of the banner slogan. In National Day celebrations, banners and slogans usually involve politics, culture, history and other aspects, and the signature can provide more information and help the audience better understand and recognize the meaning and value of the banners and slogans.

Therefore, when making National Day celebration banners and slogans, it is usually necessary to add appropriate signatures.