Most Mandarin varieties have four tones. The final stops of Middle Chinese have disappeared in most of these varieties, but some have merged them as a final glottal stop. Many Mandarin varieties, including the Beijing dialect, retain retroflex initial consonants, which have been lost in southern dialect groups.
explorer.exe is a system process that is needed for your PC to work properly. It should not be removed. Check your system now to identify unused processes that are slowing down your computer. The explorer.exe file is an executable file for Windows Explorer.
You will find the File Explorer shortcut in the Windows System folder. The executable file for File Explorer is explorer.exe. You will find it in the Windows folder. If you double-click on it, you start File Explorer. You can always create a shortcut to File Explorer and pin it to the Desktop or the Start screen.