Can I apply in Chinese embassy Bharain and get the Visa same day?

I am working in Saudi Arabia and visited CHINA three times for business and attend Canton Fair two times. I am pakistani national. Ihave all doccuments from chinese forign affairs and invitation. I just received the documents. If I apply through Chinese Embassy Riyadh today the I will get back my Passort Saturday 14, 2012. But I want to travel Friday 13, 2012 to attaend the first Phase of Canton Fair. My question is can I apply in Chinese embassy Bharain and get the Visa same day. Iam living in Al Khobar Saudi Arabia whcih is very near to Bahrain. Please let me answer now.

Thanks and best regards,

Shahid Qureshi