Companies that provide services such as writing papers, guaranteeing papers, buying and selling do not hesitate to provide services that undermine academic norms in order to make money, which shows that such companies may have no bottom line in order to make money and promise to write things on their behalf at will, which will further worsen the authors suffering from lazy cancer and even eventually affect their reputation. A good paper company will tell you clearly that they are not omnipotent. They only do what they are good at, not what they are not good at, and there is no guarantee that the paper will be published. In the process of revision, they need the author's active cooperation and can't hand over the article to the paper revision company. So it is difficult to write a paper, and it is even more difficult to find a reliable paper company. Although everything is difficult at the beginning, it is not difficult if there are experts to give advice. This is a sufficient question.