After having a sex change operation, a person receives a sex change certificate from the doctor, which he or she can take to the household registration authorities to get a new ID card and amend his or her household registration information (for example, by changing "eldest son" to "eldest daughter").
變性之後，變性人帶著醫生開立的性別變更證明，就可以前往戶政機關更換身分證，同時變更戶籍上的家庭排序，例如將長男變為長女等等。