What is Weng Wanda's description of Fu Xuan Town and Datong Town in Ming Dynasty?

Weng Wanda was very familiar with the border affairs of the Ming Dynasty. He thought, "On the shore of Baode in Shanxi (now Baode in Shanxi), Eagle Castle in the east is 250 miles. West Road (Datong) Yajiaoshan (Eagle Fort North) runs north and south, passes through Zhongbei Road, and reaches the entrance of Dongyanghe Town of East Road (Datong), with a distance of 647 miles. Fu Xuan West Road, to the east of Xiyang River, Lizhong North Road to the east of Sihaiye in Yongning (now Yanqing, Beijing), with a distance of 1023. The so-called extreme edge (that is, announcement and foreign affairs). Laoyingbao turns from south to east, passing through Ningwu (now Ningwu, Shanxi Province), Yanmen and Beilou (now the northeast entrance of Yingxian County, Shanxi Province) to Pingxingguan (now Pingxingguan, Shanxi Province) for about 800 miles. Turn south and east, and it is the Baoding boundary, which runs through Longquan, Daoma (now Maguan, Laiyuan Road, Hebei Province), Bauhinia (now Zijingguan, Laiyuan, Hebei Province), Wuwangkou, Chajianling, Futuyu and Yanhekou (now northwest of Shijingshan, Beijing), about 1,700 miles. The northeast direction is Shuntian (called Shuntianfu in Ming Dynasty, located near Shi Jing), passing through Gaoya and Baiyang (now Changping West, Beijing), and reaching Juyongguan about 180 miles away. All the mountains and hills are covered with risks, and the so-called secondary side is also. If the enemy invades Shaanxi, he will come from Datong, and if he enters Bauhinia, he will come from Fu Xuan. No one can enter the inside without going outside. " "Please build more than 1000 miles of walls and 363 towers." This is the clearest and most incisive description of Xuanhe Great Wall.