The Directorate General of Posts held a stamp exhibition in Nanking on March 20, 1948, the first Postal Commemoration Day since its approval and promulgation by the Ministry of Communications and also the 70th anniversary of the first stamp issue in the 4th year of Emperor Kuang Hsu (1878). A set of stamps in commemoration of the exhibition was issued for the occasion.　　The stamp design in this issue is a combination of two original stamps： (1) the 10 ￠commemorative stamp bearing Dr. Sun's portrait in commemoration of the success of the revolution of China issued in 1912, and (2) the $500 commemorative stamp showing a plane and a junk in commemoration of the 50th anniversary of the establishment of the Directorate General of Posts issued in 1947. In a horizontal panel at the top are the characters〝郵政紀念日郵票展覽〞(Stamp Exhibition on Postal Commemoration Day). At the bottom of the stamp are three interlocking horizontal panels. The middle one has the numeral〝1948〞indicating the year of the Stamp Exhibition. The one in the right shows the denomination in Chinese characters and the one on the left shows it in Arabic figures.　　In this issue there is only one denomination, printed by the Dah Yeh Printing Co., Shanghai by offset process.　　At the request of philatelists, a similar stamp exhibition was held on May 19 of the same year in Shanghai, where the Hsin Kuang Stamp Association, Shanghai (上海新光郵票會) joined in the exhibition with the stamps in its collection. During this stamp show, a commemorative stamp, also printed in the Nanking original plate but in gray green color, was issued and put on sale. This commemorative issue was partly perforated and partly imperforate and also printed by the Dah Yeh Printing Co.