Step 1: Download CAD Reader and install it. Click here to download CAD Reader.
Step 2: Open CAD Reader and log in to your account. If you do not have an account yet, please register one.
Step 3: Click on the “Account” – “Enter invitation code”, then enter the invitation code that your friend shared with you, and click on “Apply”. Then, you will get a 30-days free VIP of CAD Reader if you are new to CAD Reader and have used a valid invitation code successfully.