Why can't someone enter the house with mosquito nets?

Because someone comes in when installing mosquito nets, mosquitoes may come in. Once mosquitoes enter the unfinished mosquito net, the mosquito net loses its function.

In addition, when someone comes in to install mosquito nets in Feng Shui, the wind will blow in, causing mosquito nets to float around, which is easy to suffocate and unlucky to attract yin.