国开行发行3年期债券，规模85亿元，发行利率1.5727%，预期1.6000%，投标倍数2.57倍，边际倍数1.44倍；国开行发行7年期债券，规模30亿元，发行利率1.7065%，预期1.7000%，投标倍数4.27倍，边际倍数1.45倍。

Group 1 - The China Development Bank issued a 3-year bond with a scale of 8.5 billion yuan and an issuance rate of 1.5727%, which was lower than the expected rate of 1.6000% with a bid-to-cover ratio of 2.57 times and a marginal ratio of 1.44 times [1] - The China Development Bank also issued a 7-year bond with a scale of 3 billion yuan and an issuance rate of 1.7065%, slightly above the expected rate of 1.7000%, achieving a bid-to-cover ratio of 4.27 times and a marginal ratio of 1.45 times [1]