Mid-Autumn Festival and National Day are important festivals in China. People usually decorate houses, offices, shops and public places with bright banners to express holidays and blessings. Regarding the question of hanging banners at the entrance of the community, whether it is allowed or not needs to consider the following factors:

1. Community regulations: Different communities may have different regulations, and there may be regulations or restrictions on the decoration of doors. You can check the relevant regulations issued by the community management office to determine whether you can hang banners.

2. Fire safety: Banners are flammable. In order to ensure the safety of residents, fire safety regulations should be observed. If the community regulations prohibit hanging banners at the door, it may be because of fire hazards.

3. Community awareness: If hanging banners may affect the interests of other residents in the community or cause unnecessary disputes, then some people may object. In this case, it is best to act after the community neighborhood Committee or property company communicates with other residents and obtains extensive support.

Generally speaking, whether banners can be hung at the entrance of the community needs to be decided according to the specific situation. I suggest you check the community regulations first and communicate with the community management office or property management company to ensure compliance with relevant regulations and community knowledge.