http://en.wikipedia.org/wiki/Irreligion
Irreligion is an absence of religion, indifference to religion, and/or hostility to religion. Depending on the context, it may be understood as referring to atheism, deism, nontheism, agnosticism, ignosticism, antireligion, skepticism, freethought, or secular humanism.
Hong Kong ranks fifth, and China ranks first in irrelgious population by country.
