question about perlunicode "Unicode Character Properties"

in perldoc perlunicde : Unicode Character Properties : Scripts

I see a Han, which can be use as $string =~/\p{Han}/;

my question is how can I find out what exactly "Han" is ?
I know \p{Han} can match a Chinese word,
also tested it to match each word in perl-src/ext/Encode/t/gb2312.utf,

but I do not know the exact range of this \p{Han}.

thanks!