"That slap was for Boss. If Boss was here, it wouldn't be just a slap. He would instead beat you until you wake up from your current pitiful self." The right hand Han Jijyun used to slap Qi Long was placed behind his back, hidden from Qi Long's view. It was trembling uncontrollably. His originally white and elegant hand, quickly began to throb, turning his hand blood red.
Qi Long had instinctively used his domain concept to protect his body so when Han Jijyun, who had just reached pseudo domain stage, slapped him, his hand got injured from the slap.