Product name: perfume test paper.
No matter what kind of fragrant base material you smell, beware of the smell fatigue caused by too much smell, resulting in a sense of smell paralysis. When the scent begins to wane, the smell should be restored to normal. A simple way to do this is to take a deep breath three times through a piece of woollen fabric (a scarf, shawl) to reenergize the smell. Some people say that smelling fresh coffee beans or putting a piece of ocean on your tongue will have the same smell and fresh effect, which can be chosen according to your personal circumstances.