Ren Qing had no idea how the Mud Gang affair would ferment, but in any case, he received the mission's reward the very next day.
He had assumed, as Huang Ziwang had said, that the payment would be delivered by a Nether Crow. Instead, Mu Yi arrived.
This was mainly because Song Zongwu had been held up by something urgent and could not get away, so he entrusted Mu Yi with informing Ren Qing of the Blood Crystals in detail.
This showed that Song Zongwu was still keeping an eye on Ren Qing's movements.
After Mu Yi's explanation, Ren Qing understood why the Jailer Hall treated Blood Crystals as currency.
First, they were truly convenient to carry.
As long as they were roasted at high temperatures, Blood Crystals would liquefy and fuse together.
Yet after fusing, the Blood Crystals' volume did not change in the slightest; only their color and weight increased.
Ren Qing chopped a Blood Crystal in half. The damaged crystal quickly turned back into a droplet shape, yet its total weight remained the same.
This showed that there was almost no loss.
As a result, the weight of Blood Crystals became the standard for determining their value.
Around one jin of Blood Crystals was called a "Sheng"; ten jin made a "Dou," while a hundred jin was a "Shi."
These units of weight had actually been used for a long time. Not only the Jailer Hall, but ordinary civilians used them as well. It was said they had a history of over a thousand years.
Ren Qing found this deeply puzzling.
From what he could see, Sanxiang City possessed no records whatsoever concerning history. No one even knew what dynasty this was, yet everyone had grown accustomed to it.
In order not to reveal anything unusual, Ren