The Chinese will soon have access to the Trans Siberian Pipeline to complement train supplies from russia. Future plans might include a route through the Pakistani port of Gwadar and an overland pipeline from Pakistan.
http://www.dailytimes.com.pk/default.asp?page=2006%5C05%5C24%5Cstory_24-5-2006_pg1_1
Umm,where exactly does the article say India is "interested" in the I-variant??For all you want,China can offer it's J-10 or the US,the F/A-22-doesn't mean the IAF needs to be interested.This move is more a sign of Lockheed's desperation than anything else.The only aircraft which the IAF was interested in was the Mirage-2005.
The time being taken to issue RFPs is directly linked to the N-deal with the US.Once it is seen as being "safe" which will be in matter of months,we will get a clearer picture.