What is sour sugar?

Acid-like q sugar. Sweet and sour fudge wrapped in colored plastic paper is called sour Q candy. The advertisement for this candy was shot and endorsed by a beautiful girl, Wang. Sour Q sugar is simply the light of soft candy when I was a child. It's cheap and delicious, with many flavors, a circle of sugar outside and a circle of acid in the middle, which is appetizing and delicious.