差不多，北京城北面的门，以前皇帝亲征回来从这进城。后来明朝于谦在这设伏，保卫了北京城

来源: cguevara 于 2025-12-15 18:18:57 [旧帖] [给我悄悄话] 本文已被阅读：次

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