Elder Rostellum is a politician with the skill to sense sounds. Although he does not know what kind of mission these big figures carry, he can perceive what they want to express.
First, these people all have a strong interest in Guru Mountain. However, due to the previous issues with the Alchemy Workshop, they are currently unable to take action because whatever secret was on that mountain has already been taken.
Secondly, these people came for the Governor's son. Now that they see that the young master is unharmed, the worry in their hearts has finally been relieved.
Elder Rostellum sensed these emotional nuances early on.
Therefore, he knew how to write this report, even though he understood many of the details only superficially. That did not matter; his sound sensing skill as a politician told him what to do, and delivering the message well was all he needed to accomplish.
Thus, Elder Rostellum was very adept at this aspect.
He wrote the report smoothly and quickly.
