It seems there's going to be a Sora no Otoshimono event in China
(Shenzhen) 5/14 to 5/17, and Nomizu Iori and Mina are going to attend.
Just across the border from Hong Kong.

Info in Japanese

  http://newtype.kadocomic.jp/soraoto/2010/04/post-160.html
  http://contents.surpara.com/newmedia2010/

Info in Chinese

  http://www.cnicif.com/

Iori's blog post

  http://blog.livedoor.jp/calamity_a/archives/1369635.html

But I can't make out which day exactly they will have the live event..

--
Hitoshi Doi
                         " this space for rent "
http://www.usagi.org/doi/                                    doi@usagi.org