6.2.3 According to the bill of quantities confirmed by the first, for the 90% of payment on the monthly completed quantities, the first party should make it to the second party 10 days after his confirmation; and for the rest 10% the first party should make it to loan bank to pay back the bank loan which is guaranteed by the standby letter of credit by the second party until the principal of the loan has been paid off. Meanwhile, the interest of the loan should be paid separately by the first party and the guarantee by the second for the financing of the first party will be discharged (The detailed repayment plan refers to the repayment agreement signed among the first party, the second party and the bank);