This complete mint never hinged set of surcharged air mail stamps from 1948 features the iconic image of the Junkers F-13 monoplane flying over the Great Wall of China, symbolizing technological advancement and national connectivity during a time of economic turmoil. Issued on June 24, 1948, at the height of China’s hyperinflation crisis, the original lower-denomination stamps were revalued with bold red surcharges ranging from 10,000 to 50,000 Chinese dollars. These emergency revaluations were printed using gravure by the Commercial Press Ltd. in Hong Kong and Dah Yeh Printing Co. in Shanghai, and were issued without watermark. The set is catalogued as Michel CN-IM 850–855, Scott CN-IM C54–61, Yvert et Tellier CN PA39, Stanley Gibbons CN-IM 1022–1026, and China Stamp Society CN-IM AM99–103. The design blends historic and modern elements, with the rugged expanse of the Great Wall serving as a dramatic backdrop to the soaring aircraft—a visual metaphor for endurance and progress in the face of adversity. These stamps were used to meet escalating postal rates on airmail routes during a period of collapsing currency and national upheaval. Condition Mint never hinged set with crisp impressions, strong color, and clean margins. Estimate "$220 – 280".