A member country that has joined the International Monetary Fund has a certain quota in organizational content. This quota includes the national currency (75%) and reserve position (25%) paid by member countries themselves. The reserve position is paid by special drawing rights and designated foreign exchange, and it is enough to withdraw this part of the loan, so it is also called reserve share.
The International Monetary Fund lends these domestic currencies handed in by member countries to others for use (a member country may not increase its reserve position by buying foreign exchange, but may increase its reserve amount because other member countries buy its currency from the IMF). At this time, 75% of the member countries decreased and became the creditor countries of the IMF.
The IMF's borrowing from this country means that this member country has used that part of its reserve position.
I didn't seem to make myself clear. I don't know if I made the question clear.