 The subject of the Nanking Massacre entered Chang 's life again almost two decades later when she learned of producers who had completed documentary films about it . One of the producers was Shao Tzuping , who helped produce Magee 's Testament , a film that contains footage of the Nanking Massacre itself , shot by the missionary John Magee . The other producer was Nancy Tong , who , together with Christine Choy , produced and co @-@ directed In The Name of the Emperor , a film containing a series of interviews with Chinese , American , and Japanese citizens . Chang began talking to Shao and Tong , and soon she was connected to a network of activists who felt the need to document and publicize the Nanking Massacre . 
