Liu Lianjing is an author about whom limited public information is available. His known work is You Know or Don't Know the History of Germany, which is classified under world history. Judging from the subject matter, the author attends to the overall development of German history and seeks to present historical episodes that are often overlooked or easily misunderstood in a question-based and engaging manner. The title's phrase "you know or don't know" suggests the book's approach: it addresses general readers while indicating that the content includes historical details and lesser-known facts beyond common knowledge. Based on the available information, his nationality, dates of birth and death, educational background, and other writings cannot be confirmed, and only one of his works is included in the collection. Therefore, an understanding of Liu Lianjing should mainly rest on this work itself, which reflects the author's attempt to popularize national history and guide reading through questions, making it suitable for readers interested in German history as introductory and further reading.
