The 1200 won exchange rate range will never become permanent.

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If it breaks below 1310, I plan to step in to defend the exchange rate.
Just kidding.
The government needs to make up for the significant reduction in foreign exchange reserves during periods of high exchange rates.
Export companies also need to purchase a lot of foreign exchange at these low points.
There is a tendency where if the exchange rate drops, exports decrease again, leading to a further reduction in foreign currency supply.
Individuals are also buying up currency every time it drops.
While it might hit the 1200 range for a moment, it will only be very brief.