After Jiang Tang gave pills to his parents, he did not leave. He wanted to help them solidify their bodies. Once they have real bodies, they could act like real people and cultivate into Ghost Immortals without relying on puppets!
Ghost Immortals can also marry, but their marriage partners are, of course, of the same kind. They can also have children, and the children born are not ghost babies but real living creatures!
In their village and other neighboring communities, there were many children, young men, and young women. Although they've grown up over the years, there are certainly still some like him who haven't married or settled down!
After becoming ghosts, some of them were eaten by other ghosts!
The souls he saved could actually marry each other!
Jiang Tang had no interest in managing the ghosts within the Hell Space; he currently didn't care about them. As for whether they would marry in the Hell Space?
