回复：thanks,but if so, why 2006,2008 got big differnce

If you check the DHS statistics, the EC6 category (CSPA principal) numbers are confidential for recent years. and don't forget there are CSPA derivatives.

But as I said earlier, the primary reason that Chinese EB is fewer than India (or even South Korea) has more to do with 7% in total (EB+FB+other) categories that are subject to numerical limits. (so IR is not counted)