1. First, let's open the video without subtitles and click on the video playback page.

2. Then click the full-screen play sign in the lower right corner.

3. Then we click on the point in the upper right corner of the video.

4. Then we click on the cc subtitle in the pop-up window.

5. Now let's click to select Chinese subtitles.

6. Finally, we will see Chinese subtitles under the video of mobile phone. This is how the language is translated into Chinese.