That is interesting.. I have never thought about that but it does make sense actually. If you look at the political situation there, then this control suddenly doesn't sound that strange :)
But I wonder.. how long does it take to board the subway? If you have to do the security checks all the time, then everything must take ages..
How much time did you spend in China? Are you actually still there? I've probably read about it but forgot..
Have a great week too!
It takes some more time, but not as much as you may think. It also isn't that extenisve as at the airport. You just have to walk quickly through a detector and let check your bags - the stuff often isn't really interested at what is in your bag. But we never where at the subway during the real rushhour - no idea how this works out when so much people need to go to the Subway!
We were in China for three weeks and came back mid August.