Why is KFC's chicken tip off the shelf?

New market test. As a product of 20 19, KFC chicken tip was taken off the shelf on 202 1 and can't be bought. Judging from the advertising slogan, KFC's wing tip is only sold for 4 days. This is a sudden attack by KFC, a new market test. KFC's products are random, and each product is different. The wingtips are also random. Maybe this product hasn't been on the shelves this week. KFC has many kinds of products, including chicken ice cream. If you really want a product, you can wait until it is on the shelves.