1956
The stamp shows a map of China and modes of transportation. It was issued by the Republic of China (Taiwan) to commemorate the 60th anniversary of the founding of the modern Chinese postal system.
1957
The stamp was issued by the Republic of China in 1957. The legend on the map says, "Recovery of the Mainland."
A second issue was released also in 1957. The obvious difference is the dark blue border.
The map on this souvenir sheet shows the territorial claims of the Republic of China in the South China Sea. The island in the upper right corner is Taiwan, while the smaller island on the left side is Hainan. The mainland in the upper section (left to right) shows Laos, Viet Nam, and the Peoples Republic of China . A small portion of the Philippine Island of Luzon appears at the right margin. In the lower section (left to right): Philippines (orange), Malaysia (yellow), Indonesia (red), and Brunei (green). The brown line encloses the area claimed by the Republic of China. The pictures show the monuments built on the islands of Pratas (left) and Itu Aba (right) by the Ministry of the Interior of the Republic of China. The sheet was issued in 1996.