When Jun Gu died, because of the Soul Calming Jade, his soul was protected but because of a combination of many erroneous factors, his soul entered into Soul World and became a Spirit Envoy. After entering Soul World, Jun Gu didn't forget things of his past but because his soul was temporarily stabilized by the Soul Calming Jade, it wasn't very stable and often times his memories would become chaotic and messy. Although not a dead soul, Jun Gu was intelligent and possessed extraordinary talent, and so when he entered Soul World, he attracted the attention of the Spirit Tree. In order to repair the soul of Jun Gu, the Spirit Tree also gave him a lot of soul power as a support, and taught him to cultivate his own soul power in the way of the Soul World.