Yesterday was a bad day for me, because my database was broken by accident, I had no idea what happened on it, It just showed a message saying “can't select database”, but I can't find where the problem was by checking my database, it seemed everything was OK, but just couldn't visit my blog as usual. I posted a discussion in blogcatalog.com for help, some kind men gave me many useful information. But I am too stupid to solve such problem. So, at last, I created a new database, then moved my blog to this new database. Now everything is OK. What's more, it seems that my blog loads faster than before, this can comfort me.
I hope such problem won't happen on my blog again in the future. But who knows.