|Stamp Name||Hunan Air 1 Dr. Sun Yat-sen Issue Surcharged as Air Mail Unit Stamp with the Overprinted Character "Hsiang" (1949)|
|Stamp Cat Standard||Air Mail Stamps|
|Stamp Cat||Chiefs Of State, Emblems|
|Dimension of stamps(mm.)|
|Size of souvenir Sheet (mm.)|
Dr. Sun Yat-Sen stamps of 40,000 denomination of the Third Shanghai Dah Tung Print were overprinted in black as air mail postage stamps. In a vertical line on the right side and a horizontal line at the bottom in the shape of a carpenter's square is the overprint〝國內航空郵資已付〞(domestic air mail postage paid) in No. 5 Sung characters. The character〝湘〞(Hsiang, abbreviated name of Hunan province) was separately overprinted in the upper top corner.