Situation: The user brings her Google Pixel 3 phone to China. When she tries to connect a wifi, it shows Limited connection. She has tried disabling/enabling WiFi, restart the phone, but none of them fixes the problem.
Troubleshooting: Search Google, we find some people have the same issue and they post: It is because Pixel/Android was trying to connect to a google server to determine the internet connectivity. Unfortunately, Google service I snot available there.