The music in those operas in particular went through revolutionary change. The resulting tunes were very famous, and everyone could sing them. This was partly because there weren't any other operas performed in those days, but also because the melodies were good and catchy.
戲曲之「曲」尤其產生革命性的變化，做出來的曲子家喻戶曉，人人都會唱，這固然是因為那時也沒別的戲唱，但旋律也的確好聽，容易朗朗上口。