(As we all know, the future is the world of data. Whether you are an operator or a coder, in this world, if you don't understand data analysis, you will be eliminated! And I'm sure you've felt the changes around you. Many industries have eliminated a number of practitioners who do not understand data. The new retail will become a deadly poison for many people. Just like today's sudden discovery that you don't have to bring cash when you go out, it will surprise many people!)