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As to who “Lazlo” is (it’s a common Hungarian name, both given and family, alternatively László (Wikipedia)), it appears to be a “Jason E. Lazlo”, as per The Washingtonian (Washington DC magazine), Volume 18, 1982, p. 108, which gives it in this form (as part of an alphabetical list of aphorisms):

Lazlo’s Chinese Relativity Axiom: No matter how great your triumphs or how tragic your defeats—approximately one billion Chinese could care less.
    —Jason E. Lazlo

This “Jason E. Lazlo” does not appear in Google or Google Books, and the few results for “Jason Lazlo” look like someone else (admittedly, this quote is 30 years old). Ostensibly not a famous person (next quote is by , by contrast); if original with The Washingtonian, perhaps a journalist, intern, reader, or friend of such; if not, perhaps a forgotten aphorist, comedian, or private person.

FWIW, the question is also posed over at: