The UPU Hermes stamp issued by Hong Kong in 1949.

A registered letter from Shanghai ot US in 1948.

A Chinese domestic letter in 1948.

The letter addressed by General Wang, Yu-Ming in December 1946.

A 1946 cover franking 2 WWII victory stamps.

First day cover of US/China for WWII stamp in 1942.

A domestic cover franked with US/China for WWII stamp in 1942.

A letter franked with signle and double circle SYS stamps in 1938.

A letter from China to USA in 1938.

A postcard from Manchuria to Korea in 1940s.

A letter from Shanghai to USA in 1924.

Chinese express mail receipt in 1920s.

The first stamp issued by Czech in 1918. (Designed by Alfons Mucha)

A cover from US Shanghai station to US mainland in 1905.