Bat-Undrakh is a film engineer at the Central Archives for Films, Photography and Audio-visual records of the National Archives of Mongolia. His job is to clean and preserve archive films, such as converting them from 35mm film to a digital form. The National Archives of Mongolia holds 211 films from 1935 to the 2000s and more than 1100 documentaries from 1935 to the present day. In addition to films, you can also find Film News Magazines, photographs and audio recordings. This institution is the only state authority that preserves this type of historical documents.