Also referred to as Wei Sanlang (Third Young Master of the Wei Family), he is the legitimate third son of a marquis household. In the original book, he was described as 'a gentleman, gentle as jade.' He is the one Jiang Fei was originally supposed to marry. Jiang Fei needed to marry him to follow the plot and torment the female lead (his younger sister), which would eventually lead to Pei Jing killing her entire family.
