What's the point of pasting window grilles with the word "Fu" on them?

How to affix the window grilles with the word "福": The window grilles are affixed to the windows, one on each side. When there are many window grilles, it is best to use even numbers, so that they can be paired and bring good luck during the festival. The window grilles with the word "福" can be pasted upside down, which is a homophone for "福来".

Pasting the word "福": Many people take the homophonic sound of "福来" and paste the word "福" upside down. In fact, there are also particularities in pasting the word "福". The characters "福" on the door cannot be pasted upside down. This can be seen from the old buildings. None of the characters "福" on the screen wall of the courtyard are upside down. The small blessing characters on indoor doors, cabinets and other furniture can be pasted upside down. The characters for "福" are either large or small. Starting from the gate and going from the outside to the inside, the characters for "福" are larger first and then smaller.

On the first day of the first lunar month, commonly known as the Spring Festival, on this day, decorating the home environment with window grilles has become an important part of the Chinese Spring Festival celebrations. Window grilles are rich in content and have a wide range of themes. Since most of the buyers of window grilles are farmers, window grilles have considerable content to express farmers’ lives, such as farming, weaving, fishing, herding sheep, feeding pigs, raising chickens, etc. With its unique generalization and exaggeration, window grilles vividly express auspicious things and good wishes, decorating the festival with prosperity and joy.