At this moment, Lin Xian, who had been constructing the railway, finally outlined a circular railway formation. However, he didn't complete it in a full circle. Instead, he initially had Dragon Mountain No.1 lay tracks in reverse on the inner loop, so that by disconnecting the Joint Train in the middle and letting Dragon Mountain No.1 pull into the inner loop, this double-layer train formation could quickly take shape, saving half the time, and ensuring the defense perimeter wasn't overly large.