"Wan Xifeng, the person Wan Xifeng killed, was a newly-minted scholar named Du Bingkun. He came from a poor background but became Cui Bu's student, the Family Head of the main branch of the Cui family, due to his talent and learning."
"And then?"
"Although Du Bingkun came from poverty... it's said his father once saved a member of the Demon Sect back during his exam days. That member of the Demon Sect is said to be Gongsun Guan, the seventh-ranking expert under the heavens.
To repay this kindness, Gongsun Guan gifted Du Bingkun's father a piece of golden paper. This golden paper... I don't know its origins, but from my inquiries, it supposedly contains an exceedingly important Cultivation Technique from the Demon Sect."
