Why did I fail to use the Bank's card to the ICBC's card for ten yuan? Isn't virtual currency arbitrarily arbitrarily? How much is that? Every bank ...

Why did I fail to use the Bank's card to the ICBC's card for ten yuan? Isn't virtual currency arbitrarily arbitrarily? How much is that? Is every bank the same? Is there an upper limit? What if it is an integer one hundred? Detailed explanation, three grams of oil!