The materials in the Scriptural Repository could roughly be divided into three categories:
The first was historical records, which documented the Dragon Clan's intentions in constructing the Eastern Pole Palace, namely to surveil the Heaven Pillar of the Eastern Pole.
The second was tests, recording a series of observational data the Dragon Clan gathered about the Heaven Pillar of the Eastern Pole.
The Heaven Pillar of the Eastern Pole was considered to exist not within this space but on the reverse side of the main world, "back to belly," propping up the firmament of the main world.
However, this support was far from fail-safe because the Heavenly Demons from beyond would continuously bombard the firmament, and yet, the Heaven Pillar remained unmaintained.
As one side weakened and the other grew, there would inevitably be another cataclysm one day.
The ancient Dragon Clan conducted research on the Heaven Pillar for a thousand years and finally concluded: