The stamps overprinted as air mail unit postage stamp are those of the $7,000 denomination of the Second Shanghai Dah Tung Print. The overprint was made by the Ta Wen Printing Press(南昌大文印刷廠), Nanchang. Overprinted on both sides of the portrait in new No. 5 Sung characters is the wording〝國內航空郵資已付〞(domestic air mail postage paid) and overprinted at the bottom of the stamp is the character 〝贛〞(Kan), which is the abbreviated name of the Kiangsi province.