If the program is already in Mandarin langauge, doesnt it makes more sense to have English subtitles instead of Chinese subtitles so that non mandarin speaking viewers can watch the show as well?
Are you able to switch the subtitles for the channel using your remote control?
My default setting is for English.
All the China programs(didnt check HK and Taiwan) do not have English Subtitles. Korean dramas are good, comes with English subtitles.