Issued on February 1, 1949 during the hyperinflationary Gold Yuan period, this mint never hinged block of six features the 50 cent black surcharge on the brown 20 dollar tax stamp, repurposed for definitive postal use. Printed lithographically with variable perforation and issued ungummed, the stamp measures 26 x 23 mm and is classified as Type I, recognizable by the thick numerals in the original “20.” The design incorporates transport imagery—airplanes, locomotives, and passenger ships—symbolizing national connectivity and economic ambition in the final year of Nationalist administration. Catalogued as Scott IM913, Michel CN-IM 981, Stanley Gibbons CN-IM 1122, and China Stamp Society CN-IM 1304, this block is well-centered with sharp surcharge impressions, clean margins, and is preserved in mint never hinged condition. Estimate "$160 – 190"