how could I get visa to China from Iraq? I need to be in China for business in the first week of September.

Please check the China Embassy in Iraq what kind of materials you need for China Visa application.

Normally you need an invitation letter from a specific Chinese compnay.

You may visit http://www.fmprc.gov.cn/eng/ljzg/3647/3648/t18417.htm
for Chinese visa and procedure for visa application information.

Here is the China embassy for your information.

Address: AL-MANSOUR HOTEL SALHUYAH, BAGHDAD
P.O. BOX 8020, BAGHDAD, IRAQ
PHONE: 964-7901912315 ; 964-7901912316
FAX: 870-600323984
E-MAIL: mfa.gov.cn|chinaemb_iq