The first thing to do is to make sure that you have the right software installed on your computer. You will need a program that can read and write Chinese characters. Once you have the software installed, you can then download Chinese subtitles for the movie you want to watch. There are many websites that offer free Chinese subtitles for movies. Once you have downloaded the subtitles, you can then open the file in the software you have installed and start watching the movie with Chinese subtitles.