we count the whole Delhi-NCR region as capital
btw NCR-national capital region
it includes delhi as a whole along with satellite smaller cities mainly IT and industrial hubs like Gurgaon , Noida , dwarka , Faridabad , meerut and Ghaziabad and many other smaller villages and towns
Let me explain myself: all the Chinese cities that surpass Beijing would do, but those that are below Beijing wouldn't do.
kept thinking lagos was capital of nigeria