I watched the fire shutter video!

I watched the video because the Alji app told me to.
I just did app tech, but I gained valuable knowledge!

In case of a fire
If you are not aware in advance that there is a fire shutter itself or an emergency exit nearby...
You might not be able to escape around the fire shutterㅠㅠ

There are three types, so please also familiarize yourself with the picture on the right +_+