进出口行发行3年期债券，规模20亿元，发行利率1.5630%，预期1.6300%，投标倍数4.28倍，边际倍数2.87倍。

Group 1 - The company issued a 3-year bond with a total scale of 2 billion yuan [1] - The issuance interest rate was set at 1.5630%, while the expected rate was 1.6300% [1] - The bid-to-cover ratio was 4.28 times, indicating strong demand, with a marginal ratio of 2.87 times [1]