Remnants of a small fort from before Nanzhao.
Sitting high on top of the mountain at 2723m, this seems to have been a simple palisade. The dating is contested see 杨美劳, 盛代昌: 弥渡白岩四座古城遗址简述
References
| 杨美劳, 盛代昌: 弥渡白岩四座古城遗址简述, passim |
Related Literature: The Manshu, Book of the Barbarians
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| 陈楠 | 藏史丛考 | 1998 |
| 方国瑜 | 史万岁南征之石门关 | 1980 |
| 方国瑜 | 樊绰《云南志》考说 | 1981 |
| 方国瑜 | 两爨六招地理考释 | 1982 |
| 廖德广 | 南诏史探选题与专论 | 2016 |
| 李庆华 | 白崖旧城新识 | 2009 |
| Luce | The Man Shu - Book of the Southern Barbarians | 1961 |
| 木芹 | 《云南志》校补序 | 1980 |
| 木芹 | 云南志补注 | 1995 |
| Notar | Contested terrains of history: Reading The Book Barbarians | 1992 |
| 宋蜀华 | 从樊绰《云南志》论唐代傣族社会 | 1978 |
| 王忠 | 新唐书南诏传笺证 | 1963 |
| 文薇, 尹家政 | “腾冲”、“柘俞”地名考注 | 2007 |
| 向达 | 蛮书校注 | 1962 |
| 向达 | 《蛮书校注讀后》識語 | 1965 |
| 杨希义 | 唐代行交州海门镇所在方位考辨 | 1983 |
| 赵鸿昌 | 南诏编年史稿 | 1994 |
| 赵吕甫 | 云南志校释 | 1985 |
