It is not necessary to go back to the registered permanent residence for divorce.
 If the mainland residents divorce voluntarily, both men and women need to go to the marriage registration office where one party's permanent residence is located to apply for divorce registration. Both parties may not apply for divorce by agreement in other places where either party's registered permanent residence is located. However, in the case of divorce through litigation, both parties can not only apply for divorce through litigation at the marriage registration office in the place where one party's residence is located, but also bring a lawsuit in the People's Law of the jurisdiction where the defendant has resided for more than one year. Therefore, whether it is necessary to go back to the residence for divorce depends on the way of divorce.
 [Legal Basis]
 Article 1076 of the Civil Code states that if the husband and wife divorce voluntarily, they shall sign a written divorce agreement and apply for divorce registration in person at the marriage registration office. The divorce agreement shall specify the intention of both parties to divorce voluntarily and the consensus on matters such as child rearing, property and debt handling.