Televiseddocumentary derives from movies, the early homiletic works became a tool for framer to realize their propaganda purpose.
电视纪录片脱胎于电影，早期作品说教味较为浓重，大多是创作者实现宣教主旨的工具。
2
Documentary film is the art of time. Record inevitably encounters history. The characteristics of the full length televiseddocumentary have determined that it has inborn relationship with history.