This mint never hinged block of four features the 1943 regional surcharge issue from the Kiangsi and Hunan provinces, where a red "20¢" overprint was applied to the original 21 cent olive brown Martyrs stamp. Printed by Commercial Press Ltd. in Hong Kong using gravure, this emergency revaluation reflects localized adjustments made during wartime inflation and postal rate instability in Nationalist-controlled interior regions. The base design commemorates revolutionary martyrs alongside Dr. Sun Yat-sen, with classic vertical formatting and symbolic Republican architecture. Issued without watermark and with variable line perforations, the stamps measure approximately 22 x 26 mm and were printed on unwatermarked paper during a period marked by logistical constraints and shifting printing standards. Catalogued as Michel CN-IM 534, Scott CN-IM 546e20, Stanley Gibbons CN-IM 694e, and China Stamp Society CN-IM 863, this regional variant carries strong historical significance as a wartime provincial adaptation. Condition Mint never hinged block with bright red surcharges, sharp impressions, and full selvage at bottom. Estimate "$85 – 95".