A research encyclopedia entry treating the 2017 Chinese Transgender Population General Survey as knowledge infrastructure, tracing its online recruitment, the path from 5,677 submissions to 2,060 valid questionnaires, later academic reanalysis, and comparison with the 2021 survey, with an evidence-infrastructure chain and number-provenance ledger.

Using hospital records, media narratives, administrative rules, community hotlines, litigation and surveys, and digital archives, this study reconstructs mainland China’s transgender public history through six documentary regimes and a reproducible source-card method.