Wow! How cool that there is a website on this! My mom was a kindergarden teacher and taught me this song back in the early 70s. I loved it and made her sing it to me over and over and now I sing it to my son...he's only 5 months...unfortunately I won't be able to sing it once he understand and can repeat the words because it has now been deemed politically incorrect, but anyway...here is the version I know:

Once there was a China man
His name was Chicka chalu Chapan
His hair was short, his teeth were long
And this is the way he walked along,

Chicka chalu chalu Chapan
Challapy Allapy, Chicka Challapy
Chicka Chalu, Chalu Chapan
Challapy Allapy China Man

Alas this poor old man he died
And in his coffin did reside
They shipped him back to old Japan
And that was the end of the China Man

Chicka chalu chalu Chapan
Challapy Allapy, Chicka Challapy
Chicka Chalu, Chalu Chapan
Challapy Allapy China Man