By this I will stop crawler to look into just one subfolder /emba/. My post detailed earlier setup, i.e. used just "disallow: /" which means entire site will not be crawled/indexed.
I have also removed the index.html file at the root which redirects visit to My EMBA if someone hits just sfong.net.
What I will do is to upgrade my current plan to multi-site then I could make the class blog to run under its domain name emba2006cu.hk without redirection. Currently a domain name pointing is setup so visitors will be here if they use http://emba2006cu.hk