Liao Jiayi's background?

It didn't take more than twenty minutes for all of the participants to be healed and restored fully by Yang Qing. 

Bu Fui had his missing arm restored, Tang Su had the various holes, ruptured organs, and broken bones healed, Yan Qiu had his body detoxified along with the injuries he suffered along the way when he decided to speed run the mountain and abandon all caution.

The first-place finisher Liao Jiayi was completely healed. However, he was still unconscious. He had overdrawn the abilities associated with his physique which put a strain on not only his body but his soul too.

From what Yang Qing and the rest had gathered, Liao Jiayi had a physique associated with the Kunpeng. However, the physique wasn't a naturally occurring one.