What does the red and blue card mean?

Red and blue cards originated from the traditional catering industry in China, and are usually used for bookkeeping and checkout. The waiter will give the guest two small notes, a red card and a blue card. Generally speaking, red cards indicate that guests need to check out, while blue cards indicate that guests still need to order and stay in the restaurant. This simple but practical system has also been used for reference by service industries in other places, such as restaurants, bars and nightclubs.

Besides being used in service industry, red and blue cards also have new applications in modern life. For example, some people use red and blue cards to manage their time. The red card means that urgent things need to be dealt with first, and the blue card means that things that are not urgent can be dealt with later. This management method can help people use their time more effectively and improve their work efficiency.

In addition to the application in daily life, red and blue cards are often used for psychological counseling. Psychologists will give patients a red card and a blue card at the beginning of treatment, so that patients can choose according to their own feelings. For example, patients can use red cards to express their troubles and problems, while using blue cards means that they are satisfied and comfortable with their emotions and state. This technology can help patients better understand their emotions and needs and help doctors treat patients' emotional problems more accurately.