国开行发行2年期债券，规模50亿元，发行利率1.5200%，预期1.5100%，投标倍数3.22倍，边际倍数1.67倍；国开行发行5年期债券，规模100亿元，发行利率1.5261%，预期1.5300%，投标倍数3.37倍。

Group 1 - The China Development Bank issued a 2-year bond with a scale of 5 billion yuan and an issuance rate of 1.5200%, which was lower than the expected rate of 1.5100%, with a bid-to-cover ratio of 3.22 times and a marginal ratio of 1.67 times [1] - The China Development Bank also issued a 5-year bond with a scale of 10 billion yuan and an issuance rate of 1.5261%, slightly above the expected rate of 1.5300%, with a bid-to-cover ratio of 3.37 times [1]