How do stock recommendation companies cheat?

For example, if a stock is now in 5 yuan, these people will buy it in large quantities and keep the price around 5 yuan. Of course, you can't just talk without practice. No one will believe you. Ok, take out tens of millions to start speculation, go to 5.5 yuan, and then start sending messages to you, saying that XX shares will go up sharply, and they can go up to 8 yuan. You can send messages to tens of thousands of people. Then, under the impetus of everyone, when the stock rose sharply, people quietly shipped. If it is from 5 yuan to 8 yuan, and it costs 50 million yuan to pull it up, then he can earn several times by selling it. How much do you think he earned? So don't believe that in China, no one will tell you about making money.