1987 When I was traveling in Putuo, I bought a commemorative coin of the zodiac, which has been fragrant for many years. What is the reason?

I'm an old tourist, too. You guessed right. Indeed, souvenirs used to be purely commemorative, but now they are not a bit smelly. Many zodiac commemorative coins are very popular, and what you smell is really the smell of boxes. Many boxes are either sandalwood or agarwood, which tastes good. It should be impossible to buy low-priced ones now, so I suggest you collect them carefully.