How to open the Win10 preview version 10134 night mode

Open the run by Win+R, enter regedit and press Enter to open the registry editor.
1, press Win+R to open the run, enter regedit, press Enter to open the registry;
2, expand
HKEY_CURRENT_USERSOFTWAREMicrosoftWindowsCurrentVersionThemesPersonalize
3, create a new DWORD (32-bit value);
4, will Rename the new item to AppsUseLightTheme
5, set the new item value to 0 (by default, it is 0), as shown below.

It is worth noting that the night is turned on in Win10 Preview 10134. After the mode theme, the window border of the Modern application such as the Edge browser is also displayed in black.