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.
1986
1953
1999
1987
1962
2001
2004
2007
1980
1981
1997
2002
1998
2006
1973
1971
1984
