求助,使馆签证官给我发了一封邮件,求大神帮忙看一下

我是自己DIY的,没有中介可以求助,所以希望大家帮个忙~~

Thank you for your application for a student visa which we received on 30 April 2013 and accepted for processing on 30 April 2013.
Approval in Principle of a Student Visa Application:
We are pleased to advise that your application for a student visa has been approved in principle. Please forward the following original documents to our office on or before 28/05/2013:
1. The payment of the course fee advised by New Zealand institute
2. Evidence of funds for maintenance while in New Zealand which can be either:
(i) a letter or certificate from a bank of New Zealand confirming that funds of NZD15,000.00 have been deposited in New Zealand; or
(ii) if the course is for less than 36 weeks NZD1,250.00 per month of your intended study or
(iii)a letter from the educational institution confirming that accommodation and other living expenses are included as part of a prepaid package; or
(v) travellers' cheques or bank documents in your name
Note:
Evidence of funds of at least NZ$1,250 per month of study (less prepaid living expenses) or NZ$15,000 per year (less prepaid living expenses)
3. An updated offer of place from your New Zealand institution advising when the course you have paid for will begin and when will finish
4. We acknowledge received your notarised Chinese Police Clearance Certificate, however, a complete Chinese Police Clearance Certificate should be included a photocopy of the original police clearance certificate letter issued by the local Public Security Bureau or Vice Squad. Please provide a photocopy of the original police clearance certificate letter issued by the local Public Security Bureau or Vice Squad.
Please ensure that the above items are provided all together within the requested time frame, or the application #11931174 will be declined.

我的去签证中心的时候,资金证明,无犯罪证明之类的资料都交了,这是让我再提交一份原件吗?公安局开的无犯罪证明信交到公证处去了,难道要重新准备?

这个叫做预签吧……对了……楼主什么时候递交签证的？？？