皇太极继努尔哈赤之汗位不久,即以和谈为掩护,改革政治、经济,实施“剪枝斩根”的战略措施,不断加强“自固”。随后,便采用先关外,后关内,徐图渐进的战略方针,争夺辽西各战略要点,为进军关内,夺取中原,攻占京师,开辟通道。 Shortly after Khan’s position in Nurhachi became the cover of peace talks, Huang Taiji continued to strengthen its “self-defense” strategy of reforming politics and economy and implementing “cutting and cutting ”. Subsequently, they adopted the strategic principle of “first shutting off, secondarily shutting down, and gradually drawing on Xu plans,” competing for the strategic points in western Liaoning Province, opening up channels for entering the territory of the country, seizing Central Plains and capturing the capital.