The white paper is a normative report formulated and implemented by the government.
The Blue Book is a comprehensive research report completed by a third party.
The Green Paper is a research report on optimistic prospects.
The Red Book is a research report on crisis warning.
In addition, the covers of important documents or reports officially issued by a country's government or parliament have their usual colors. The white one is called a white paper (such as Portugal), the blue one is called a blue book (such as the United Kingdom), and the red one is called a blue book (such as the United Kingdom). The yellow one is called the Red Book (such as Spain), the yellow one is called the Yellow Book (such as France), and the green one is called the Green Book (such as Italy). Therefore, the white paper, blue book, etc. often become the code names of official documents in some countries. But in fact, a country is not limited to one color. As far as our country is concerned, the nature of the "Red Book", "White Paper" and "Blue Book" is obviously different. The "Red Book" represents the voice and position of the party, the "White Paper" represents the voice and position of the government, and the "Blue Book" represents the views of experts, scholars, and industry organizations.