Renjun was a prince in China - the heir to the throne once his father died. He was the most respected prince in China for being well educated, mannered, and for being very good-looking. He had a younger brother, prince Chenle - only one year younger than him.

He was an overall very friendly and calm person, but he was very strict about attitude and mannerisms as he was taught to be very polite ever since he was young.