Is there formaldehyde in the room to ventilate?
If you want to ventilate in addition to formaldehyde, do it after the formaldehyde release reaches saturation. For example, raise the indoor temperature and humidity upwards and seal the room. When the formaldehyde emission reaches a certain level, ventilation can achieve a good in addition to formaldehyde effect.
You can also buy several fans during the day. A bigger fan can blow air indoors and make indoor air form convection, which can achieve good results for in addition to formaldehyde.
Finally, I would like to remind you that it is best to use some environmentally friendly materials when decorating, and it is best to simplify the interior decoration without too much decoration, so as not to cause excessive formaldehyde and affect your health.