Preceding Issues Surcharged in Black - 先前的发行量在黑色附加费 1c on 1c Pink

Large Numerals. Numerals 2 1/2mm below Chinese characters

Country China
Denomination
?
Face value of a stamp, usually printed on the stamps.
— Glossary

1c on 1c
Color
?
Original catalog color of the stamp.

Pink
Print method
?
Method of process of imprinting designs on paper.

Lithographed in Shanghai
Perforation
?
Holes punched between stamps to make separating easier.
— Basic philately terms for amateurs

11 1/2-12
Watermark
?
A pattern embedded in a paper during stamp producing process.
— Basic philately terms for amateurs

Unwatermarked
Issue Date
?
Date inscripted on a stamp or cancellation for used stamps not necessary correspond to real date of stamp issue.
#
?
Catalog number of stamp.
— Basic philately terms for amateurs