国开行发行3年期债券，规模80亿元，发行利率1.5053%，预期1.5100%，投标倍数3.03倍；国开行发行7年期债券，规模20亿元，发行利率1.6721%，预期1.6900%，投标倍数4.87倍，边际倍数1.00倍。

Group 1 - The China Development Bank issued a 3-year bond with a scale of 8 billion yuan and an issuance rate of 1.5053%, slightly below the expected rate of 1.5100%, with a bid-to-cover ratio of 3.03 times [1] - The China Development Bank also issued a 7-year bond with a scale of 2 billion yuan and an issuance rate of 1.6721%, which is lower than the expected rate of 1.6900%, with a bid-to-cover ratio of 4.87 times and a marginal ratio of 1.00 times [1]