Please kindly let me know what are the document i need to summit in order to get that business visa from Singapore

(1) Passport: with a validity of six months and two blank pages at least. A copy of your passport information page is also required.
(2) Completed Application Form and a recent passport size photo
(3) original and copy of your PR
(4) invitation letter issued by your trade partner, trade fair or other invitation letter issued by any entity or individual.

Thank you ,your information was very useful for me .
Best regard's

Dear person in charge

we did summit all documents which in your previous message you indicated . but it seams your information is not up to date . Chinese embassy in Singapore rejected my document & they told me for Iranian nationality business visa , need to apply invitation from main land china approve by their foreign affairs Similar to immigration . also when we call China embassy in Singapore three times they agreed with what you mentioned in your message . but as I mentioned , at the end they rejected my documents due to changes in their immigration law since Oct 2013 . any way at the end it seams there is confusion among the people in the embassy about they new immigration law .

I am sorry for this. I am just a frequent visitor here. The information mentioned above was found on the website of CVASC in Singapore. It's the only legal corp that is allowed by Chinese embassy in Singapore to deal with the visa applications. Perhaps, the requirements vary for people of different nationalities.