Triangular sugar is a snack eaten as a child. Candy is made into various colors, such as green apple flavor, strawberry flavor, litchi flavor and so on. It is named because it is packed in triangular plastic bottles with delicious taste and low price.

Sugar is a polyhydroxy aldehyde or ketone compound, which can become one of the above two organic compounds after hydrolysis. Chemically, because it is composed of carbon, hydrogen and oxygen, similar to the polymerization of carbon and water in the chemical formula, it is also called carbohydrate.