The minimum monthly repayment amount of Changsha Bank's credit card: (10000/12)+10000 * 0.7% = 903, 33 yuan.

Specific installment fee: 0.75% for the third installment, 0.7% for the sixth installment, and 12 for the ninth installment. The minimum repayment amount is controlled by the bank and cannot be set by itself. You can apply for the minimum repayment amount for credit card due repayment.