Why is there no screen window in Chengdu?

Because there are few mosquitoes in Chengdu.

There are few mosquitoes in Chengdu, so many people are uneasy about screen windows. Screen windows are generally installed to prevent mosquitoes from flying around indoors. For high-rise residents, it is rare for mosquitoes to fly indoors, so many residents living in high-rise buildings will not install screens. But in fact, whether the screen window is installed or not depends on the actual situation of the owner and cannot be generalized. In other words, there is no need to install screens in the windows of high-rise rooms. But it is also possible that mosquitoes "follow up" through the elevator. It is recommended to install it at this time, but even so, the number is very small.