面谈通过后我的签证状态不更新 是怎么回事

我是8月7号的面谈，已经是顺利的通过了。但是我今天查询我的GUZ号，到今天都还是显示的在准备。就像这样
Ready

Application ID or Case Number:	GUZ2013619137 01 GUZ
Case Creation Date:	09-Aug-2013
Status Updated Date:	09-Aug-2013

Your case is open and ready for your interview, fingerprints, and required documents. If you have already had your interview, please check your status after two business days. If no interview was required, please check back in two business days for the status of your application.
For more information, please visit U.S. Consulate General Guangzhou.

求助一下 这到底是什么意思呢，我该怎么办。我害怕拿不到签证包。另外我也不懂签证通过后被CHECK是什么意思。求科普。