The latter belonged to the royal family.
Therefore, most of them were rogue cultivators.
They all had a better cultivation base in the Qi Condensation stage when they were born. They were at least ranked 5 or 6 in the Qi Condensation stage. Therefore, they have the possibility of cultivating the Foundation Establishment stage.
It was because the city lord would give such people from the immortal realm a basic cultivation technique.
However, although it was just the most basic cultivation technique, such a technique wasn't something people from the immortal realm with lower talent could possess. Moreover, people of the immortal realm whom the city lord had given the basic cultivation technique would have to work for cultivators above the Foundation Establishment stage as alchemy helpers, medicine-gathering boys, spirit-seeking boys, girls who wandered around, painting girls, and so on after they reached ten years old.