Lin Huang was in the Secret Forest at checkpoint 55 on the Stairway Tree.
Bai, Lancelot and the other imperial monsters were killing all kinds of monsters along the way towards checkpoint 56.
In reality, the Secret Forest was not a monster level. It was just an area with special rules. Under normal circumstance, the difficulty of this stage would be just the horrible living environment.
However, due to the special rules, many monsters from the monster hordes decided to stay. Since their size was shrunk by 1,000 times, the surface of this level was equivalent to being enlarged a million times, which was huge. The local plants and monsters that were regular-sized seemed gigantic to them whereby the various resources available were unusually rich.
One could say that the total number of monsters on this level was much more than the real number of monsters on the initial checkpoint 56. However, due to the vast surface, the monsters were scattered.