When eating in a restaurant, everyone will be provided with two pairs of chopsticks, a pair of white chopsticks and a pair of black chopsticks. Their main differences are: 1, white chopsticks with different colors are male chopsticks, which are longer; Black chopsticks are private chopsticks, which are generally shorter than white chopsticks. 2. White chopsticks are placed in different positions, usually on the right side; Black chopsticks are usually placed on the left. 3. White chopsticks with different functions are chopsticks that people use to hold food. They are put into their own bowls, but they can't be put into their mouths. They are designed for health problems; Black chopsticks are their own chopsticks. Put the food in your mouth to eat. White chopsticks and black chopsticks come from the "double chopsticks system" in the "Guide to the Use of Public Chopsticks and Spoons in Catering Enterprises", that is, one person is equipped with two pairs of chopsticks. The two pairs of chopsticks are different in color and have their own division of labor. One pair is for eating and the other pair is for eating. The Guide puts forward guiding opinions on the use and management of public chopsticks and spoons from five aspects: definition, placement, service, management and publicity. It is suitable for all kinds of catering service units, government canteens, canteens of enterprises and institutions and other collective dining places. In addition to the "double chopsticks system", there is also the "public chopsticks and spoon system", that is, "one dish and one chopstick (spoon)" Each dish should be equipped with a pair of public chopsticks and spoons, which should be placed on the right side of the dish or near the center of the table.