Where are the ancient Dai Jun, Yanmen, Yunzhong and Yuyang now?

1) Dai Jun, now the king city in Yuxian County, Hebei Province.

In the first episode, in 475 BC, Zhao Xiangzi asked people to change their kings. Let the chef hold a copper ladle to replace the king and his entourage with food, and conversely, let the butcher kill the king and his entourage with a ladle to replace the land with an army. Therefore, the country is destroyed and the county begins. During the Warring States period, it belonged to Zhao, and King Wuling of Zhao was the county.

2) Yanmen, a county in Shanxi today.

"There are nine jams in the world, headed by Yanmen." Xiongguan stands on the mountain, surrounded by dangers and high above. East and west wings, rolling mountains. Ridge Great Wall, winding in the potential, east to Pingxingguan, Zijingguan, Daomaguan, reaching the secluded rock and connecting the vast sea; Go west to Xuankou, Ning Wuguan and Piantouguan, and reach the Yellow River.

3) In the cloud, Gucheng Village, Gucheng Township, Tuoketuo County, Inner Mongolia Autonomous Region.

The first feudal city in Inner Mongolia. During the Warring States Period, there were numerous wars among the vassal states of China, and the merger struggle was extremely fierce.

4) Yuyang in the southwest of Miyun County, Beijing.

Yuyang County was established in Qin Dynasty, and Wuji County was changed to Yuyang in the end of Sui Dynasty. Yuyang County in Sui Xuanzhou and Yuyang County in Tang Jizhou both ruled this place. After the Tang Dynasty, Yuyang was ruled by Jizhou. Ming province entered Jizhou. There is a mountain in the northwest of Jixian County, named Yushan, and the county seat is in the south of the mountain, hence the name Yuyang.