Documentary works refer to works adapted from real events, which are usually presented in the form of interviews, records and reports. The specific features are as follows:

1. Authenticity: The greatest feature of documentary works is authenticity, and the author presents the facts that have been investigated on the spot and truly recorded. Therefore, the content of documentary works is true, objective and accurate, which can make readers understand the article better.

2. Diversity: Documentary works take many forms, such as investigation reports, news reports, documentaries, reportage and documentary novels. Can let readers know the facts from different angles.

3. Professionalism: Documentary works often require the author to have certain professional knowledge and investigation skills to ensure the accuracy of the recorded content. Complete professional knowledge can make documentary works better express their views.

4. Humanism: Documentary works not only pay attention to the surface of real problems, but also pay more attention to people's inner world and the expression of humanistic feelings. Through in-depth observation and experience, we can truly reflect social reality and show humanistic care.