Ya-chau, Sichuan, China (Google Maps ⧉, OpenStreetMap ⧉)

"Two routes run from Ch’êng-tu fu to Yun-nan; these fork at Ya-chau and thenceforward are entirely separated by this barrier."

"…as far as Ts’ing-k’i hien, 3 marches beyond Ya-chau, this route coincides with …"

"…[Tiao-mên and Li-Chou] [Ts’ing-k’i Hien in Ya-chou Fu]…"