In The Romance of the Gods, Taiyi is one of the disciples of Yuan God, and Nezha is his apprentice. Taiyi remolded Nezha's body with lotus root and taught him superhuman powers. Where did Taiyi help Nezha exorcise demons and protect the people with magic weapons such as Gankun Circle, Huntianling and hot wheels?

So Taiyi Zhenren and Nezha are mentoring and partners.