If it has been a month and a half and there is no special smell, you can consider moving in. You can put some activated carbon, grapefruit peel and orange peel in the room to remove the odor. Don't close the window all day, but open a gap for ventilation, especially in the room where children live. It is important to ensure the health of children.
In addition, you can also raise some plants. For example, the most common indoor plants are: aloe, chlorophytum, Eupatorium odoratum, Eupatorium odoratum, Dendrocalamus, etc. These plants can remove harmful substances in the air, especially formaldehyde. Studies have shown that Eupatorium adenophorum and Eupatorium adenophorum can absorb more than 80% of indoor harmful gases. Aloe vera is also a good hand at absorbing formaldehyde, which can absorb 90% formaldehyde contained in 1 m3 air. Tequila, evergreens and daisies can also absorb trichloroethylene in the air.