Zhao Youyue noted down the cooldown duration of the 'Two Dimensional Gate.' She learned that, the longer she stays within a literary world, the longer the subsequent cooldown would be.
Naturally, the longer she stays, she would also subject the author of that world to longer bouts of "inspirational states." That way, he would create iconic scenes that are greater in both length and intensity.
Therefore we can also say that the total duration of staying in a literary world is proportional to the possibility of creating an iconic character.
Obviously, when Zhao Youyue is within the 'Two Dimensional Gate,' some sort of energy would be consumed in exchange. The longer Zhao Youyue stays, the greater the consumption of energy, leading to a longer cooldown duration.
