Its consistently higher that what the normal currency exchange rate would suggest in Asian countries.
For example if you multiply the USD rate of 1 BTC with the CNY rate, its 1 BTC = CNY 73,600, but exchanges there have it around CNY 75,500.
Note that the price of all crypto exchange site cant be the same because each exchange dealings are not the same and the Asian exchange site are expected to have more demand than supply.
In other countries in Asia and South America also BTC is more expensive to buy in non-USD currencies than in USD.
Why is this the case?
This is the case of p2p local exchange site which I believe you referring to cause they particularly offer peer to peer exchange service which the price of BTC on such exchange site is determined by the seller actual price not the price of BTC in the market..
You try should to use exchange like bigone or bibox if youre offers from Asia.