This book reviews the process for China's new type of political party system from its birth to its test, and from its continuous institutionalization to the writing of a magnificent chapter in the new era. By adhering to high standards and quality, the United Front Work Department of CPC Central Committee deployed elite forces to set up a writing team, consulted historical documents of millions of words, and completed the compilation work after more than two years of efforts. The book shows major historical moments of multi-party cooperation, answers many theoretical and practical questions of concern at home and abroad, and recounts many good stories of interaction between leaders of the CPC and leaders of other democratic parties, which is highly political, systematic and readable.