They are all located to the south of famous mountains or to the north of famous waters (rivers, rivers), because as the old saying goes, mountains to the south and water to the north are yang.
1. Yiyang
It is located to the north of Yishui (now Zishui). According to Ying Shao in the Eastern Han Dynasty: "In the Yang of Yishui, it should be the name of the county. (To the north of Yishui, it should be named the county)." Zhou Shurong, a Qing Dynasty man, had a "Yiyang Fu" that said: "Where Yishui passes, the north of the river is Yueyang is the name of the county."
2. Yueyang
It is located in the south of Tianyue Mountain. The period when the place Yueyang had a specific name can be traced back to the Liang State during the Northern and Southern Dynasties.
3. Hengyang
In the south of Hengshan Mountain. In 220 AD, Sun Wu established Hengyang County in the southwest of Changsha County. This was the first time in history that a county was named after Hengyang. In the seventh year of Emperor Kaihuang's reign in the Sui Dynasty (589), Linzheng, Xincheng, and Chong'an were merged into Hengyang County. For the first time in history, a county named after Hengyang appeared.
4. Shaoyang
It is north of Shaoshui. During the Three Kingdoms period, Sima Yan pacified Soochow, and in Shaoyang (originally named Zhaoyang), in order to avoid the taboo of Sima Zhao's name, it happened to be north of Shaoshui, so it was named Shaoyang.
Extended information:
There are many places in Hunan Province that contain the word "Yang" in their names. For example, prefecture-level cities with this word include Hengyang, Shaoyang and Yueyang. , there is also Leiyang among the county-level areas.
Hunan Province includes Hengshan Mountain, Dongting Lake, Xiangjiang River and other mountains and rivers, and many cities are close to mountains and rivers. Among them, the Xiangjiang River also runs through Changsha, the provincial capital. Ancient literati had a feeling of admiration for natural landscapes, so the names of these places were naturally based on geographical factors.
In ancient history, our country had profound insights into the study of geography. They call the south of the mountain and the north of the river "Yang", and the north of the mountain and the south of the water "Yin".
Yin and Yang refer to whether the sun's rays can reach it. If the sun's rays can reach it, the sun's rays here are very sufficient. People call this place "Yang". If the sun's rays are not sufficient, The place where is yin.
In a place with mountains to the south and water to the north, the name of this city contains the word "Yang", mainly because the sun can shine directly here, so there are many places in Hunan that have the word "Yang" in their names. .
Baidu Encyclopedia—Shaoyang
Baidu Encyclopedia—Yueyang
Baidu Encyclopedia—Hengyang
Baidu Encyclopedia—Yiyang
Baidu Encyclopedia—Yang