Hello, please refer to the electronic magazine "Restaurant Manager" No.5, 2116. This issue has an introduction to the relevant content, which only supports online viewing. However, you need to pay a certain fee to read the details of the electronic version. The page shows 21 yuan, so you can make a choice according to your own situation. Log in directly to official website, a magazine, and you will be able to see the relevant electronic materials and watch them online.