????:1???????????:??????

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????????????7?????????????????18???????? ?????????????18?????????,????(??????)?????????????????????????250?????????????

??????????????,?2021???,??2024??7?????24?,???????????????????AA+?????AA-???????????????

?7?????16???????,????????????????????17????????,20???2??????2.6%;20?????????????????5???????????2.7%;20????10?2.8%;20??????20???????????3.05%;20?????????????????????30??????????????????3.15%;10??????3???4.336%;??????7.5???????7???????????????3.379%?

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