Ask for an installment credit card calculation question

For example, if I had 12 months of product installment in March January 1, the next month's payment will be in April February 1, if I have made a four-month prepayment, the next month's repayment time should be June, right? I think this is more reasonable and I have never played a credit card .... or the next month's repayment time... for example, if I had 12 months of product installment in March January 1, the next month's payment will be in April February 1,
If I have made a four-month prepayment, the next month's repayment time should be June, right? I think this is more reasonable and I have never played a credit card ....

Or is the next month's repayment time counted one month after the prepayment day?

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For example, if I had 12 months of product installment in March January 1, the next month's payment will be in April February 1,
If I have made a four-month prepayment, the next month's repayment time should be June, right? I think this is more reasonable and I have never played a credit card ....

Or is the next month's repayment time counted one month after the prepayment day?

It seems that the credit card will not be paid back in advance, but I haven't seen it yet.

P2P and so on are offered back in advance, but they all pay off the rest once. I have never seen them but pay back some of them in advance.

Also, this problem has a gross relationship with PHP, which is not the topic of SF.