Express Service for Chinese Tourist Visa for OCI card holder

Hi I am currently holding Australian passport and Overseas citizen of India (OCI) card. I am flying to India on 21 November and planning to visit China for few days in late November or 1st week of December. Am I eligible for express service to obtain a Tourist L sooner like within 2 working days if I apply for it from India. Also I am visiting my friend but will arrange accommodation myself do I still need an invitation letter from him. Obtaining original invitation letter from her could delay the process. Any help much appreciated.