If you are watching on a streaming service and the non-English parts aren't showing up:
Most streaming platforms (Disney+, Amazon Prime) use generic closed captions that: shanghai noon subtitles for non english parts exclusive
Example:
You may manually have to turn on standard English closed captions (CC) when Mandarin characters are speaking, and toggle them back off when the movie returns to English to avoid reading standard dialogue. If you are watching on a streaming service
Unlike full English subtitles that transcribe every word spoken (including English), forced subs remain silent during English dialogue and only appear when Mandarin is spoken. Where to Find Exclusive Non-English Subtitles ” he said
“You brought the file,” he said, voice like a well-thumbed reel.