《明史·志·卷六十七》
依从淮安侯华云龙的意见，从永平、蓟州、密云往西二千多里，关防隘口一百二十九个，都设置戍守卫。
从淮安侯华云龙言，自永平、蓟州、密云迤西二千余里，关隘百二十有九，皆置戍守。
Following the advice of Marquee Hu Yunlong of Huaian, military guards were built at the 129 border crossings that were located more than two thousand li from the west of Yongping, Jizhou, and Miyun.