After Chen Guan captured Celestial Yang City, he discovered that there were quite a few humans imprisoned in the city's dungeons.
Some of these humans were prisoners of war captured by demons, possibly because they still had some value, so they were temporarily detained.
Another group was the merchants from within Celestial Yang City who didn't manage to escape in time when demons besieged the city. After the demons broke the city, they were locked up here.
The reason they weren't killed, of course, was that they had money. If someone was willing to pay a hefty sum for their ransom, the money would definitely be accepted. As for whether they would release the prisoners, when they would do so, and how many times they would have to pay, that all depended on Mo Qianpo's mood.
When these imprisoned humans realized that the demons guarding the jail had started fleeing, they immediately understood what was happening and were ecstatic.
