How can I factory reset a European Huawei phone in China without access to Google?

To reach Google and proceed with the next steps, you need to set up a PC that's capable of penetrating through that wall (e.g. with VPN), and make it a proxy server on the local network for your phone to use. Here's the way I do it:

1. On your PC, install Privoxy and let it through your firewall (if exists)


2. Go to its installation directory and open config.txt. You might need to open it with administrator privilege to be able to save it later.



3. Search for "listen-address" and you should get something like this:

   
   
   

   
   

   listen-address 127.0.0.1:8118

   
   

   
   
   

   It should be right above the chapter "4.2 toggle" and not have a "#" before it. Edit it to:

   
   
   

   
   

   listen-address 0.0.0.0:8118

   
   

   
   
   

   Now save the file.




4. Determine the LAN IP of your PC, usually by running ipconfig in the Command Prompt. Suppose it's 192.168.0.1.



5. Fire up Privoxy and connect to the VPN you use. Now your PC is ready; move on to the phone.



6. While in Setup Wizard, connect your phone to the same network as your PC. If you have already connected to the network, make the phone forget it and set it up from scratch. When entering setup details, check Advanced Options, then choose "Manual" for Proxy. Enter the IP and port you got previously. It should look like this:

   
   
   

   

   
   
   

   Proceed to connect.

Your phone should now use your PC as a proxy, and therefore should be able to reach Google. Follow the on-screen guidance afterwards.