Alas, Nein sprechen da deutsch! Your English seems just fine (much better than my non existent German language skills!)
Oh my goodness, I *watched* that film in theatres in 78; I'd just completely forgotten what the score sounded like. Come to think of it, I haven't rewatched any of his 70's stuff. Drunken Fist (retitled Drunken Master in English for some reason, but it Chinese, "Jui Kuen" means drunken fist technique (as in fighting style). I remember loving that in the theatre.
After all these years, I still think his Police Story was my Jacky Chan favourite film; (although Police story 7 (2013) was just *awful*)