Upon entering the software website, click "Register" or "Login" in the upper-right corner of the webpage. After successful login, place the mouse over the user nickname area, and a dropdown menu will appear. Click on "Personal Account" or "Personal Center," as shown in the following image:

   Click the invitation link, then click the copy button, send the copied content to your friends. They can complete registration by visiting the link through their browser, as shown in the image below: