Century-old Yunnan–Vietnam Railway
China's earliest international railway, linking Honghe to the wider world.
Sources: 红河州人民政府《红河州旅游文化产业发展规划（2016—2020 年）》, 维基百科《红河哈尼族彝族自治州》
河口瑶族自治县（Hekou Yao Autonomous County）Cultural profile and village-level archive are labelled separately, with per-item sources and pending markers.
Figures from different years are kept side by side; missing values are marked pending.
| Administrative type | 自治县 |
|---|---|
| Prefecture | Honghe Hani and Yi Autonomous Prefecture |
| Prefecture seat | No |
| 2020 census population | Pending research |
| Area | Pending research |
| Cultural profile | Cultural profile published |
| Village-level archive | Village-level archive pending |
Based on the official prefecture framework, with per-item sources.
China's earliest international railway, linking Honghe to the wider world.
Honghe was the starting point of Yunnan's opening to external trade.