Download 7-Zip only from its official site, 7-zip.org, to avoid malware-laden fake versions.
Look for the "Madao icon" or executable within the resulting folder to play. CHIN.7z
If you are looking to open this specific file, use these steps: Download 7-Zip only from its official site, 7-zip
Right-click CHIN.7z and select "Extract". CHIN.7z