Hsia-Kuan, Ta-li fu, Yunnan, China (Google Maps ⧉, OpenStreetMap ⧉)

"[At Hsia-Kuan, near Ta-li, Captain Gill remarked to a friend (II. p. 312) “that the salt, instead of being in the usual great flat cakes about two or two and a half feet in diameter, was made in cylinders eight inches in diameter and nine inches high..."

"On either flank, at about twelve and six miles distance respectively, are situated Shang-Kuan and Hsia-Kuan (upper and lower passes)…"