The first Yi Mountain in Zhao Kuangyin, Song Taizu, was based on the imperial tablet in the third year of Song Gande (AD 965). Legend has it that Zhao Kuangyin fought fiercely with Han Tong, the general of the Zhou Dynasty, in Yishan. Thanks to the help of Yishan God, Zhao Kuangyin defeated Han Tong. Because of this, Zhao Kuangyin defected in Chen Qiao and became a yellow robe. After winning the world and establishing the Great Song Dynasty, Yishan was named the East Town. He also built Dongzhen Temple in Jiulongkou at the foot of the mountain as a memorial, and also brought hundreds of civil and military officials to personally pay homage. Due to the expectation of the imperial court and the majestic beauty of Yishan, celebrities and poets came here to enjoy sightseeing. Since then, the Yuan, Ming and Qing Dynasties followed the ritual system, and Dongzhen Yishan became famous all over the world.
In ancient China, emperors of all dynasties sacrificed mountains and rivers. Therefore, some famous mountains representing territories or administrative divisions are named "Five Mountains" or "Five Towns". In the second year of Yuan Dade, the emperor named Yishan in Linqu County, Shandong Province as the "East Town", Wushan in Baoji County, Shaanxi Province as the "West Town", Huiji Mountain in Shaoxing City, Zhejiang Province as the "South Town", Yiwulu Mountain in Beining City, Liaoning Province as the "North Town" and Huoshan Mountain in huozhou city, Shanxi Province as the "Middle Town".
It is understood that in history, "five towns" and "five mountains" are equally famous. Five towns and five mountains have rich and colorful natural landscapes and colorful places of interest, and the national culture is profound.
Yishan, formerly known as Dong Taishan and alias Dongzhen, is the main vein of Yimeng Mountain, with a woodland area of 1587.6 hectares and a coverage rate of 73.7%. 1992 was designated as a national forest park.
The mountains in China are divided into five mountains and five towns. Mount Tai is Dongyue and Yishan is Dongzhen. In ancient times, the main mountain on one side was called the town, and "the famous mountains in each state were regarded as their state towns". Yishan, located in the south of Linqu County, is at an altitude of 103 1.7 meters, with a span of more than 50 kilometers from north to south and 20 kilometers from east to west, covering an area of several hundred square kilometers. Around the Jade Emperor Peak, there are 29 strange peaks with different postures, which is Luzhong Town. The ancients once called it "magnificent, respectful, and outstanding in the east, which is really a giant town in the East". Therefore, it is known as "Mount Tai is the head of the five mountains and Mount Yi is the head of the five towns". Zuo Si's "Qi Du Fu" says: "God made heaven, only this mountain can do it." Because Yishan lives alone in the middle of Shandong, towering and overlapping mountains, competing peaks, dense pine forests and beautiful scenery, there are many things to set up customs, temples, shrines and monuments here in the past dynasties. Celebrities and poets came here to admire their majestic beauty, leaving many poems and songs, and cultural relics and historical sites abound. Qiao Yu, the minister of the Ming Dynasty, wrote a hymn, saying, "I have been to Xishan in my life, and this is the first time I have seen it. Wandering for a day, I can't bear to go, as if I felt the gesture of spring in a rocky valley.