After Studying for Ten Years, I Discovered That It Is a World of Demons

Zhou Yan traveled to a world where humans and demons coexisted and became an ordinary citizen of Han Dynasty. He originally wanted to be the number one scholar in Guangzong and honor his ancestors. Until one day, a mourning cat and a filial dog appeared on his roof, and he realized that this was a world of demons? In this case, I won't read this book anymore, I want to practice martial arts!