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There is no gap in the installation or this is because the floor (I think you are using a solid wood floor) is deformed due to moisture, commonly known as "tile change", which means to warp up like a tile. As long as it is guaranteed that it will not get damp again, the floor will automatically recover after a while.
If the buffer strip is not installed or the strip is aging and falling off, just put the strip well.
If the anti-theft door cover is not closed tightly, the door closer can be adjusted by the following methods: >>>More
Qujiang District Shenjia Xiaotian unlocking provides anti-theft door maintenance and emergency unlocking. In this case, you need the keyhole corresponding to the file spring latch.
This is a normal situation, because after the security door is made of soft packaging, its gap is relatively small, when the door is closed, there will be resistance to the door seam, just like the scissors you just bought, it is not easy to use, but after using it for a period of time, it will be very easy. Rest assured.
Yes, put pencil toner into the key jack.