Hi Deepika:
I have the same issue with more than 10,000 installs in China for my iOS apps during august with only 637 impressions which is almost nothing compared with more than 10,000 installs.
I have searched over the groups and there is no clear answer.
"your query has been routed to a wrong department"
I think we all would be very grateful to get this clarified because we are giving our apps for free in China. No revenue.
Best,