I know some members are visiting China soon. The above route to the Great Wall seems to be running half the normal number of trains. I don't think this is a one-off as a special sign has been made (rather than a blackboard as you'd expect in the UK). Anyway, trains depart Beijing North at 0612, 0834 and 1057. I arrived today at about 0820 expecting to catch the 0902, then found a queue at a window with a notice saying the 0834 was full and they should queue for the next train at 1057. Will get up early tomorrow and report back (I went elsewhere).