When the parties submit statements, drawings, accounting books, professional and technical materials, scientific and technical documents and other professional documentary evidence to the people's court, they shall attach explanatory materials to facilitate the people's court's examination; Inquiries, transcripts of inquiries and conversation record submitted by the defendant to the people's court in administrative procedures shall be signed or sealed by relevant personnel (including law enforcement officers, interviewees, presenters and speakers). Its purpose is to ensure the authenticity of the transcript; Where laws, regulations, judicial interpretations and rules provide otherwise on the form of documentary evidence, the documentary evidence provided by the parties shall also comply with its provisions.

Documentary evidence refers to written materials that prove the facts to be proved by its contents. Everything that records people's thoughts and behaviors with words and expresses people's thoughts with various symbols and patterns, whose contents have the function of proving the facts to be proved, is documentary evidence. Documentary evidence depends on its written form in form and its relevance to the case in content, so it can be used as the basis for determining the facts of the case.

The Best Evidence Rule in Article 70 of the Civil Procedure Law

The original documentary evidence shall be submitted. Physical evidence shall be submitted in its original form. If it is really difficult to submit the original or the original, copies, photos, duplicates and excerpts may be submitted. Foreign documentary evidence must be accompanied by a Chinese translation.