Enter Shanghai with an invitation letter of duly Authorized unit.

I am Egyptian, Could I enter China with an invitation letter issued to the commissioner`s office of the foreign ministry of the P.R. China and to The Chinese consulate in Egypt to attend CHINAPLAS 2014 (23-26 April 2014). The reason of not being able to issue it is that I`ve just received my passport from the German Embassy today April 19th, 2014 and I must catch the flight April 21st, 2014. so I`ve no time to loose waiting Visa issuance, I had to achieve this work mission trip where I have to perform business meetings with Chinese authorizations and associations and related members company starting from April 22nd, 2014. Could you advice getting an entry permit from the commissioner`s office of the foreign ministry of the PR. China at Shanghai airport.