The bones of pureblood dragons and sub-dragon species are very difficult to distinguish just by appearance.
"Read about it in books," Sunan casually said.
For someone like him, who is 'experienced', it is quite easy to differentiate between sub-dragon species and dragon species, as there are many subtle differences between them.
The traveler obviously didn't believe such a dismissive reason but, seeing that Sunan wasn't going to say more, he didn't ask further either.
"So, the creatures you mentioned living in Zone 2, stronger than sub-dragon species, are these dragons?" Sunan pointed to the bones and said.
"Correct." The traveler nodded, looked around, and said with a bit of emotion, "Zone 2 of this eco-park was originally supposed to be a zone for cultivating dragons. Perhaps due to an energy shortage, this area gradually became desolate, and those dragons gradually died out."
Sunan raised an eyebrow, "The barrier we passed through earlier?"
