When the seal is blue, it is called a blue book (such as England); if it is red, it is called a red book (such as Spain); if it is yellow, it is called a yellow book (such as France); if it is green, it is called a green book (such as Italy). Most countries use white paper and blue book, especially the white paper has become an official document recognized internationally. However, a country can use a variety of document cover colors. For example, the white paper is used in the annual report of Japan's defense, which is called the white paper, while the blue paper is used for the annual report of Japan's foreign affairs.
The white paper was originally named after the white paper used for both the cover and the body of the book. Both "white paper" and "white book" in English are translated into white papers in Chinese. But there are differences between them
In the UK, "white paper" mainly refers to short reports published by the government. It can be used in any subject matter, any organization, or political official statement containing background materials.
However, "white book" is a longer and more important and substantial one, which is mainly an official report on major issues. In addition to Britain, other countries often do not make a strict distinction between "white book" and "white paper". In April 1965, the United Kingdom published the white paper on the question of Gibraltar in the form of "white book". The title of the book was white paper, and the cover was also white.
Japan, South Korea and other countries, also known as "white book", are also borrowed into literature, referring to records, manifestos, etc., such as "travel white book".