cover 1893 (23 May) envelope (trivial foxing) from Kewkiang to Shanghai, bearing 1892 Colours Changed 2c. green bisected vertically tied by "LOCAL POST/SHANGHAI" and crayon strokes, both in blue, the reverse showing  "CUSTOMS/KIUKIANG" despatch c.d.s. in red partly overstruck by "CUSTOMS/SHANGHAI" c.d.s., also showing "SHANGHAI/LOCAL POST" c.d.s. in blue. An extremely rare and possibly unique usage of mail from Kewkiang sent via the Shangai Local Post. Photo
cover 1893 (23 May) envelope (trivial foxing) from Kewkiang to Shanghai, bearing 1892 Colours Changed 2c. green bisected vertically tied by "LOCAL POST/SHANGHAI" and crayon strokes, both in blue, the reverse showing "CUSTOMS/KIUKIANG" despatch c.d.s. in red partly overstruck by "CUSTOMS/SHANGHAI" c.d.s., also showing "SHANGHAI/LOCAL POST" c.d.s. in blue. An extremely rare and possibly unique usage of mail from Kewkiang sent via the Shangai Local Post. Photo

Details
cover 1893 (23 May) envelope (trivial foxing) from Kewkiang to Shanghai, bearing 1892 Colours Changed 2c. green bisected vertically tied by "LOCAL POST/SHANGHAI" and crayon strokes, both in blue, the reverse showing "CUSTOMS/KIUKIANG" despatch c.d.s. in red partly overstruck by "CUSTOMS/SHANGHAI" c.d.s., also showing "SHANGHAI/LOCAL POST" c.d.s. in blue. An extremely rare and possibly unique usage of mail from Kewkiang sent via the Shangai Local Post. Photo
Further details
Note: There never was a Shanghai Local Post Agency at Kewkiang, and the Kewkiang Local Post did not open for another year after this cover was mailed