After clicking inspect
Pop-up box, but it's white inside
PS: The original effect is not like this, but the picture can't be found casually
The reason can be seen here: http://www.cnblogs.com/slmk/p/7591126.html
It probably means that you need to download something from the google homepage for the first debugging with a device, but google is blocked by the wall, so it is stuck
Here is one of the solutions: over the wall
Use lantern for overturning the wall, this is his github homepage https://github.com/getlantern/forum, you can download the latest version