It seems like you might be referring to a VPN service that is integrated with the知乎 platform. If that's the case, you can use a VPN to protect your internet connection and access the content on知乎 securely.

1. Create an Account on知乎: Go to the知乎 website and create an account if you don’t already have one.

2. Enable a VPN on Your Device: Ensure that you have a stable internet connection on your iOS device and any necessary plugins or extensions installed.

3. Configure the VPN on Your iOS Device:

   • Open the知乎 app on your iOS device.
   • Tap on "Settings" (or "Settings" and "Account" if you have an account).
   • Under "Account," ensure that your account is set to "Unrestricted" or "Secure."
   • Go to the "Security" section and enable "VPN" if it's not already enabled.
   • Choose a VPN service from the list and set up your preferred settings (e.g., encryption type, strength, and dialling options).

4. Access Content on知乎: Once configured, you can access the content on知乎 using your VPN credentials to ensure both security and privacy.

If you have a specific question or need further assistance, feel free to ask!