Tese Wintz Neighbor is a long-time China watcher. She's been involved with leading groups to China and teaching about China for many years. She worked in Beijing and Hong Kong in the early 1980s, when she worked for China Pictorial and also led some of the first bicycling tours of China. She headed the Seattle World Affairs Council's professional development program for many years. This is a carefully compiled list, presenting films in reverse chronological order. She's painstakingly included links to trailers and full films. You can download the pdf and search it. 

https://jsis.washington.edu/earc/wp-content/uploads/sites/8/2021/06/China-Documentaries-and-Feature-Films.pdf