Why didn't Ming Jiang put all his tricks online?

Don't sell online. Ming Jiang skill is a compulsory course to learn the skills of line test and problem solving. Only do offline sales, not online sales. Fake and shoddy products will appear on the Internet, which will damage its reputation, so we open a shop online. The contents of this set of questions are all classic examples, and the examples made are also very easy to understand.