Treasure of Bruce Lee (1979)

Bruceploitation films are not always bad, some indeed are pretty good even if they are shameless cash-ins on Bruce Lee's name, but Treasure of Bruce Lee is pretty mediocre. Master Chen is training four pupils including Bruce Le. With the Japanese poised to invade China, Master Chen knows the importance of his ancient skills, details of which are kept in a book... which the Japanese led by Vivian Velasco are desperate to get.

Master Chen challenges his four pupils to protect the book, though one of them Cha Ya-Fan turns out to be a traitor. So far so good (if unsurprising) but then the film makers decided to splice in footage from another Bruce Le film which throws everything into confusion...

So it could have been a reasonable martial arts film but everything just goes wrong. The scenes showing kung fu training though is interesting. Everything else is... not so much.