These ebuilds come from https://github.com/microcai/gentoo-zh.
If you have some problems, go to the official site first.
thunar-dropbox : Plugin for thunar that adds context-menu items for dropbox. ( http://www.softwarebakery.com/maato/thunar-dropbox.html )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoo-zh
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoo-zh-portage
If you have a problem : ycarus(-at-)zugaina.org