Magic Whip (1968) - Part of the Wong Fei Hung series?

[66 Mantis]

Was looking up the old Wong Fei Hung films that starred Kwan Tak Hing (haven't yet seen any of them) and amongst the lists, I came accross "The Magic Whip". It was filmed in 1968 (right in the middle of the brief series revival) and co starred Shek Kin. But nowhere is this one listed as part of the series. Was this film part of it or was it a one a one off deal that just happened to star the same two leads?