You cannot install the Play Store with one file. You need four specific Google components. Download the latest versions from a trusted mirror (like APKMirror) for Android 7.1 (Nougat) or Android 8.1 (Oreo) depending on your Sunmi V2 firmware version:

Installing Chrome for better web-based dashboard management. Troubleshooting Common Issues

If your device does not show the Play Store, you can attempt these methods: Sunmi V2 Pro Sunmi V2 Pro works with Android 7.1 OS.

Since the Play Store is likely missing or disabled, you can use these alternatives to get your required reporting or business apps: V2 Handheld POS Computer - ICS

If the manual installation feels too risky, you can still get the apps you need using these popular alternatives: