1. The logo on the coat cuffs does not need to be cut off, but the logo on the suit cuffs needs to be cut off, in order to follow the etiquette principles of wearing a suit and show that you are not superior to others.

2. Some high-level people will wear suits when they get together. Wearing suits is also to respect each other. But generally there will be labels on suits. The correct way is to cut off the labels on the suit, also to make it consistent with other people's outfits.