国开行发行1年期债券，规模70亿元，发行利率1.4019%，预期1.4000%，投标倍数2.80倍，边际倍数40.00倍；国开行发行5年期债券，规模100亿元，发行利率1.5305%，预期1.5500%，投标倍数3.36倍，边际倍数1.29倍；国开行发行10年期债券，规模210亿元，发行利率1.6681%，预期1.6600%，投标倍数2.70倍，边际倍数2.76倍。

Group 1 - The China Development Bank (CDB) issued a 1-year bond with a scale of 7 billion yuan, an issuance rate of 1.4019%, and a bid-to-cover ratio of 2.80 times, with a marginal ratio of 40.00 times [1] - The CDB issued a 5-year bond with a scale of 10 billion yuan, an issuance rate of 1.5305%, and a bid-to-cover ratio of 3.36 times, with a marginal ratio of 1.29 times [1] - The CDB issued a 10-year bond with a scale of 21 billion yuan, an issuance rate of 1.6681%, and a bid-to-cover ratio of 2.70 times, with a marginal ratio of 2.76 times [1]