What if the windows are not allowed to open in the three-door corridor?

If windows are not allowed in the corridors of three households, the following solutions can be considered:

1. Contact the property management company or the owners' committee and ask whether there are relevant regulations or policies and whether there are solutions.

2. Negotiate with other owners to see if any other owners have encountered the same problem, and if so, they can unite to solve it together.

3. Install ventilation equipment, such as air purifier or ventilation system, to improve indoor air quality.

Planting plants indoors helps to purify the air.

5. If the above measures can't solve the problem, you can complain to the local government or health department and seek their help and advice.