i'm curious as to why some of the labial initials are followed with eng and others with ong when they all have the same rhyme whether the speaker rhymes them with teng or not i wonder the same about ben pen men fen and wun this seems an inconsistency with the way standard mandarin is pronounced in taiwan those with heavy taiwanese accents as opposed to standard mandarin would say wun or even wun being a glottal stop but the same people would say hun instead of fen