There are several situations:
First, due to the epidemic,
The family works outside together,
Didn't go home,
Therefore, the Spring Festival couplets are not posted at the door;
In the second case,
Because I don't care much about my family,
Inadvertently ignored the posting of couplets;
In the third case,
There was a funeral at home a few years ago.
You can't post couplets at home during the Spring Festival.
This custom has spread everywhere.
In the above three cases,
It is the result that there are no couplets at home.