To locate full-text scholarly articles written in Chinese use China Academic Journals and remember to search using simplified Chinese. For citations to articles written in journals published in Taiwan, search Periopath using traditional Chinese and request the articles through interlibrary loan. For articles about Hong Kong cinema published in Chinese journals, use traditional Chinese and search HKInChiP.
Here are some other websites related to Chinese film:
Please consult this subject guide on Film Studies for recommended databases and resources that cover English language scholarship on Chinese film.
UC San Diego's Chinese Cinema program is probably the best in North America. Please see Yingjin ZHANG's website for recommended bibliography, must-see films, stills and posters, etc.
For basic information about Chinese movies, biographical information about actors & directors, awards posters, and links to DVDs for sale, don't forget to consult the Chinese Movie Database in English (or Chinese if you prefer)
You can find reviews in English about Hong Kong (and some China and Taiwan) films at LoveHKFilm.com
The Modern Chinese Literature and Culture Resource Center has an image archive for Chinese films. Here you will find stills from many of the famous Chinese movies, divided by time period.