Ngan-ssŭ-to, Salar pa-kun, Gansu, China (Google Maps ⧉, OpenStreetMap ⧉)

"Besides these Salar kiun there are five outer (wai) kiun: … Ngan-ssŭ-to, …"

"just before the confluence it receives on the left a stream of inferior calibre, the Ngan-ning Ho, which also flows in a valley parallel to the meridian…"

"the name and direction from Yang-chau are probably sufficient to indicate (as Pauthier has said) that this is Ngan-king on the Kiang, capital of the modern province of Ngan-hwei."