China 1896 (Shanghai) Kewkiang Local Post 5c slate-blue/yellow-ochre Postage Due error, SGD27aChina 1896 (Shanghai) Kewkiang Local Post 5c slate blue yellow ochre Postage Due overprint type D9 (D under St), error overprint inverted, SGD27a. A fine mint example with large part original gum. A rare inverted overprint error. Kewkiang is located in Kiangsi Province, 458 miles up the Yangtse River from Shanghai. It was opened to foreign trade by the Treaty of Tientsin in 1858. The Kewkiang Local Post was established 1 June 1894. BUY NOW: Order