According to today's headline website, sugar is sugar without preservatives, and the main raw materials for making it are sugar beet and sugarcane. Because I often see white sugar, I am already familiar with its appearance and shape. White sugar is granular, the granules are crystal, the size is uniform, the color is white and the sweetness is pure. Some groups have a great demand for white sugar, such as those who open pastry shops and sell sugar cakes. When they buy sugar, they usually buy it in large quantities at one time. Of course, many of the sugar bought by these groups have legitimate uses, but they also need to be noted, otherwise they will be found by the relevant departments. For individuals, there is not such a big demand for white sugar at ordinary times, and few people will hoard a lot of white sugar. Individuals who buy a large amount of sugar at one time for no reason will be "checked on the water meter". The reason behind this is that in addition to normal consumption, white sugar has another little-known improper use. There is a substance called "KN-SU", which is called potassium nitrate-sucrose in Chinese. Its raw materials are potassium nitrate and sucrose. The main component of white sugar is sucrose. KN- Su Can was obtained by redox reaction after mixing potassium nitrate with white sugar in a certain proportion. KN- Su Can is used as fuel for rocket propulsion, while KN-SU is a very dangerous explosive as combustion improver. Individuals who buy a lot of white sugar will be targeted to prevent them from making KN-SU with white sugar, which is an illegal act, so it is necessary to control the consumption of white sugar.