Manori Ravindran International Editor Cargo Film & Releasing has acquired domestic and international rights to director Violet Du Feng’s feature documentary “Hidden Letters.” The film had its world premiere at the Tribeca Film Festival and its European premiere at the BFI London Film Festival. It won Best Documentary and the Audience Award at the Austin Asian American Film Festival. Cargo will premiere the film theatrically starting in New York and Los Angeles on Dec. 9. “Hidden Letters” follows two millennial Chinese women connected by their passion for Nushu, a secret female-only language that for centuries has allowed women to communicate privately without men understanding their correspondence.