Binding Xiao Yan: I Am a Level Higher Than the Protagonist

The protagonist is an otaku who just graduated from the 21st century. He likes to watch Dou Po Shang. He accidentally travels through the world of Dou Po. The original owner is named Lin Yichen. He is the only son of the Master Sword Master of Wanjiange Pavilion (Iron Sword Master). He gets a binding system at the beginning, which binds the original protagonist Xiao Yan. He starts to fall flat.