i would like to apply HK visa in Dubai

i am residence in Dubai .Do i need to make appointment to apply to China Consulate or i can go and apply directly there with the complete documents But i want to go to HK on nov 1 and i have only 10 days left after i have would complete all documents.10days could be enough ??? I know officially 4 or 6 weeks but as a urgent request ???Waiting for ur answers and thank you indeed