There is an underlying story about a lazy son who knows some kung fu but mostly fakes it to show off. After being exposed he does good by improving his skills to the point where he can finally knock down his kung fu master father.
1999
1983
1980
2016
1987
2010
1966
1978
2006
1993
2002
1986
1994
1979
2004
2017
2009
1984
