In the Central Demon Suppression Tower, there were ten teleportation gates, but only one was the True Door; the rest were Fake Doors. Each Fake Door led to two different directions, and the vast majority of the teleportation endpoints were above the Eleventh Floor of the Central Demon Suppression Tower.
That is to say, the probability of finding the True Door on each floor was only one in ten, and the probability of finding the True Door twice in a row was only one percent. By extrapolation, reaching the 10th Floor would require passing through nine True Doors, with the probability being one in a hundred million. Thus, within the Central Demon Suppression Tower, the probability of stepping into a Fake Door was terrifyingly high, and to do so usually meant death.
