One of them was called Gu Yan. He was a member of the wyvern race. Wyvern race members were generally tall, exceeding five meters in height. The most eye-catching thing about them was that they had a pair of wings similar to that of pterosaurs, with wingspans of up to five meters. They mostly resided on cliffs, and had living habits similar to that of birds.
When their children were almost a month old, they would throw their children directly off the cliff. If the children could not fly, then they would fall to their deaths. This race paid particular attention to natural selection.
While this was not particularly ethical, it did give rise to stronger and more tenacious offspring. Furthermore, their childhood experiences usually resulted in more brutal and ruthless personalities.