第一只品种是1997年向社会发行的无记名（一期）国债，期限三年，于2000年5月1日到期，一次还本付息，年利率为9．18％。兑付本息为（3×9．18％×100）＋100＝127．54元。第二只品种是1997年向社会发行的三年期凭证式国债，于2000年3月1日起陆续到期兑付，截至2000年12月31日 The first breed was an anonymous (one issue) government bond issued to the public in 1997 with a maturity of three years and expired on May 1, 2000 with a debt service at an interest rate of 9.18% per annum. The principal and interest payment is (3 × 9.18% × 100) + 100 = 127.54 yuan. The second breed is a three-year voucher type treasury bond issued to the public in 1997 and is due to expire on March 1, 2000. As of December 31, 2000