STILL over populated,, in despite of as now a day,,, the rail track in china is in its best,, the most advance and the most efficient,, but still whenever under circumstance as harsh weather,, power outage what so ever reasons,, big train station stack full of passengers and long waiting list to obtain ticket to the destination,, all the trains are facing overwhelmed number of riders,, I see these over crowded situation only in the airport,, no such thing happen in any train station in the united states,,,