国开行发行185天期债券，规模20亿元，发行利率1.3908%，预期1.3200%，投标倍数2.97倍，边际倍数2.17倍；国开行发行3年期债券，规模80亿元，发行利率1.5370%，预期1.5000%，投标倍数2.23倍，边际倍数8.31倍；国开行发行7年期债券，规模20亿元，发行利率1.6550%，预期1.6500%，投标倍数4.50倍，边际倍数10.00倍。

Group 1 - The China Development Bank (CDB) issued a 185-day bond with a scale of 2 billion yuan and an issuance rate of 1.3908%, exceeding the expected rate of 1.3200%, with a bid-to-cover ratio of 2.97 times and a marginal ratio of 2.17 times [1] - CDB issued a 3-year bond with a scale of 8 billion yuan and an issuance rate of 1.5370%, higher than the expected rate of 1.5000%, with a bid-to-cover ratio of 2.23 times and a marginal ratio of 8.31 times [1] - CDB issued a 7-year bond with a scale of 2 billion yuan and an issuance rate of 1.6550%, slightly above the expected rate of 1.6500%, with a bid-to-cover ratio of 4.50 times and a marginal ratio of 10.00 times [1]