How do Win10 Mobile users exit the preview version of the official version?

Microsoft recently pushed the "Windows Preview Experience" application on WP8.1 and Win10 Mobile. The latest version number is 1.3.233.2. In this version, Win10 Mobile Preview users can enjoy the upgrade of the official Win10 mobile system after leaving the program.

So how do I exit the Windows Preview Program and get the official version of Windows 10 Mobile?
Please see the detailed graphic operation steps for the following script house:
If you have not logged in to Microsoft before Account, then you did not participate in the Windows preview; if you have logged in to a Microsoft account before, then the system will automatically log in again. Click on the departure plan below.

The following will appear directly to the account you have logged in, click on the login below (this is not handled well, leave the plan should write verification.)

The Microsoft Windows Preview experience will confirm with you To choose to leave the program. (We are very sad to learn that you are leaving.)

Click on the continuation of the above picture to complete the departure plan of the Windows preview experience and return to the normal Win10 Mobile upgrade channel.

Follow the steps to upgrade.