The primary reason they were still able to hold the line was that Maya had added armor to the train, making all doors and windows impregnable. Otherwise, the crushing pressure from the passenger cars would have broken the doors by now.
Maya stood on the outer boarding ladder at the head of the train, watching how the humans who failed to catch up were tackled down by zombies. Furthermore, massive hordes of zombies were surrounding both sides of the railway track, but they posed no threat to the train now picking up speed.
Maya walked through several carriages until she reached the supply carriage. Looking through the glass of the carriage door, she paused, at a loss, "Any good suggestions?"
Lin Wu replied, "Detach the passenger cars."
Qinglang gave a thumbs up; it was indeed a good idea. The greatest threat to the players right now was not zombies, not energy or food, but these hundred-plus NPCs.