Why do foreigners know China cheongsam and seldom know Hanfu?

Because China cheongsam is closest to our time. Women wear clothes, and now there are many women wearing China cheongsam in the street, so it is normal for foreigners to know, but China Hanfu has been far away from us for a long time, and there are still fewer people wearing Hanfu, so it is normal for foreigners not to know.