Dear Prof. Kim,

Please see my comment below:

I see.  So.. there will be about 50,000+ Traditional Chinese char, right?
That's what I want to know.

It can be right from the source you identified. It is 19520 TC characters from 
the source of IANA IDN Repository http://www.iana.org/domains/idn-tables/tables/tw_zh-tw_4.0.1.html. It reflects different number of TC chars from different sources.
Such as CGP final proposal also adjust the total number of TC/SC characters which
specifically for Root Zone LGR.

Regards

Kenny Huang