Avoid using "Extract Here" or "Extract to Folder" immediately.
Many small-to-medium Chinese enterprises use business management or "Shengyi" (Business) ERP software. The .rar file may contain the installation package or database backups for these tools. shengyi.rar
Some .rar files are configured as "SFX" (Self-Extracting) archives that can run hidden scripts (like .bat or .vbs files) the moment they are opened. Avoid using "Extract Here" or "Extract to Folder"