Little-known etiquette

Do not shake hands with gloves.
You can't go indoors with a hat.
If you're talking to a stranger on the phone, we need to introduce ourselves first.
No one will be called by phone after 22:00 unless necessary.
Elbows are not placed on the table while eating.
Soup does not drink by slurping.
Table manners must be followed.
Public transport needs to be observed in-vehicle rules.