The history of the Northern Song Dynasty and the Jin Dynasty's alliance with the Jin Dynasty to destroy the Liao Dynasty and the Jin Dynasty to destroy the Northern Song Dynasty was a tragedy full of strategic shortsightedness and dynasty overthrow. Among them, the "Maritime Alliance" and the "Jingkang Incident" were two key nodes, which profoundly reflected the political corruption and diplomatic mistakes in the late Northern Song Dynasty.
From the Southern Song Dynasty to the Mongolian annihilation of the Jin Dynasty to the Mongolian annihilation of the Southern Song Dynasty, the fate of the Southern Song Dynasty has always been closely linked to geopolitics and internal governance. Its history not only shows the tenacity of military resistance (such as Diaoyu City and Yashan), but also exposes the fatality of political shortsightedness and institutional shortcomings. This period of history is not only a microcosm of the rise and fall of the dynasty, but also an important case for later generations to reflect on "strategic choices" and "national destiny."
