Department of Peace.
Amongst the eight departments of a treasure master, it was one of the two most mysterious departments. And unlike the others, the Department of Peace and Turbulence hardly follows a written rule.
The reason behind this is likely due to where it originated.
Even the Fruit of Tranquility made by Qin Lan was not something that originated from Qin Lan's era. All he knows is the department has been around at least a thousand years before the First Supreme Emperor's period.
During the period of instability, the Fruit of Tranquility is accepted as a religious tribute. It was similar to how mortals prayed to their ancestors and presenting filial offerings on their remembrance date each year.
This product is mainly used to create a temporary truce between mankind and Yao Beast.