《宋史·列传·卷一百七十一》
自城以东，古岭、光锋直到三氵义，没什么可阻碍敌人的。 于是就修复十一个内隘，另在城外建了十个关隘，有离城数十里的。
盖自城以东，古岭先锋直至三〈氵義〉，无所限隔。 乃脩复内隘十有一，别作十隘于外，有距城数十里者。
From the east of the city, Guling, Guangfeng all the way to San Y, nothing could obstruct the enemy. So eleven inner passes were restored and ten more passes were built outside the city, some of which were dozens of miles away from the city.