Hi,
there is no operating system in the world where you can honestly say: “100% privacy guaranteed.”
With Linux, privacy is usually more under your own control than with many commercial operating systems, but it still depends on several things:
what distribution you install,
what online accounts you connect,
what browser you use,
what apps you install,
which repositories or third-party sources you trust,
and whether you enable cloud services, sync features, telemetry, or optional user-experience programs.
Deepin has an official privacy policy, and like many modern systems and online services, it describes certain data collection in specific situations. For example, Deepin says it may collect information related to deepin ID login, community interaction, system update information such as OS version/device/CPU information, cookies, and in some cases third-party SDKs. So if privacy is important to you, it is worth reading the policy before deciding.
In general, Linux gives you more choice. You can run a system without a Microsoft account, without Google services, without OneDrive, without forced cloud integration, and without many background services that you may not want.
But the user is still important.
If you install closed-source apps, browser extensions, third-party repositories, unknown scripts, or log into many online accounts, then privacy can be reduced on any operating system.
So my simple advice would be:
If you want the highest privacy, choose a distribution you trust, keep the system simple, use official repositories where possible, avoid unnecessary online accounts, and do not install software from unknown sources.
Deepin may be attractive because it looks polished and user-friendly, but if privacy is your main concern, I would personally compare it carefully with other Linux distributions before switching fully.
Linux can give the computer back to the user, but privacy is not automatic. It is a combination of the operating system, the software you install, and your own choices.
Best regards,
Daniel