A source-critical guide that decomposes “first” claims in mainland China’s transgender medical history into procedure scope, geography, institution, publicity, administrative effect, event time, and source role, comparing the 1983 Zhang Kesha surgery, regional surgery histories of the 1990s, marriage registration in 2003, Geng Zi’s public identity in 2005–2006, and national technical rules from 2009 to 2022.

This research map organizes public transgender history in mainland China into seven intersecting paths—medicine, identity documents, work and courts, community infrastructure, public language, documentary regimes, and digital preservation—and introduces a historical conversion chain plus a source-switch method for reproducible reading.

An institutional archive guide to four decades of Peking University Third Hospital webpages, departmental histories, clinic guides, policy documents, clinical studies, and community-preserved copies, tracing how transgender medicine moved from a surgical case record to multidisciplinary care and research cohorts.

A historical-source guide that separates public self-identification and names, media labels, medical and administrative terms, and present-day editorial description, while tracking each naming event across time.

A historical study of clinical, media, administrative, and community vocabularies for transgender and gender-diverse lives in mainland China, using a vocabulary-stratigraphy model to explain how terms such as yixingzheng, bianxing ren, gender reassignment, transgender, and kuar coexist across institutions.