How to upgrade Windows10 with "Preview Version"

There are many preview versions of Win10. Currently, only the technology preview version is released. This technology preview version has many version numbers, such as 9879 and 9888. The legendary consumer preview has not yet been released. There are many ways to download and install Win10. Is it necessary to download and install Win10 every time?
The good news is that Microsoft has added the "Preview Version" feature in the Win10 Technology Preview "Computer Settings", which allows users to upgrade without having to re-download and install the new Windows 10 preview version. Just as easy as Windows updates. Here's a detailed explanation of Win10 preview version upgrade:
Open Win10“Computer Settings" (open method), then click “Update & Restore" at the bottom of the left navigation menu to see “Preview version&rdquo ; function item, select this item, the system will automatically check the new preview version. Figure:

If there is a new preview version will be displayed, then select the preview version you want to upgrade, click “Download now & rdquo;, you can complete the Win10 preview version of the upgrade.
Using the system's own "preview version" to upgrade Win10 is the easiest and most convenient thing. Microsoft is also well thought out. Windows Update is a feature of its own, and the upgraded version itself has this feature.