When we read history books, we often read hongnong Yang clan, Hanoi Sima clan, Yingchuan Xun clan and other sayings, before the famous people will almost always be crowned with regional name modification, then, Hongnong, Hanoi, Yingchuan is exactly what places, the following to the late Han Three Kingdoms period to talk about, said that the map must have time, because the administrative region will continue to adjust with time.
The territory of Hongnong County was divided into present-day Henan Province and Shaanxi Province, and the county boundary was bordered by the Yellow River to the north, from Huayin County to the east, through Sanmenxia, to the west of Mengjin, and south along Yiyang, Song County to Luanchuan County, which was the area of Hongnong County during the Three Kingdoms period.
Hanoi County is north of the Yellow River, north of present-day Dejiyuan, Qinyang, Wenxian, Wuzhi, Xiuwu, Yuejia, Xinxiang, west of Hebi City, Qixian County, and bounded by Taihang Mountain to the north.
![On glory, crushing the "four dynasties and three dukes" of the Yuan Shao family - the Hongnong Yang clan of the three nationalities[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)