Ruixing standard sugar is a special unit of measurement, which is used to express the sugar content in a cup of coffee. According to the official website of Luckin Coffee, one serving of standard sugar is equivalent to 3 grams of sucrose. Therefore, the sugar content of a cup of Ruixing standard sugar coffee is actually 3 grams.

The control of Ruixing standard sugar reflects the company's emphasis on health awareness on the basis of adhering to "high quality and low price". Nowadays, people pay more and more attention to diet health and weight loss, and sugar intake is one of the chief culprits of obesity and other health problems, so controlling sugar intake has become a major challenge in modern life.