In Dayi AD 671 (the second year of Xianheng in the Tang Dynasty), Dayi County was established in the western part of Jinyuan County. "Taiping Huanyu Ji" records: "The towns are so vast that they are named after each other." This is the origin of the name of the county. In 1284 (the 21st year of the Yuan Dynasty), Anren County and Huojing County were abolished, and their administrative areas were placed under the jurisdiction of Dayi County. Huojing County was later placed under Qiongzhou. In 1377 (Ming Dynasty), the tenth year of Hongwu (the fifth lunar month), Dayi County was abolished and the territory was merged into Qiong County. In 1380), the thirteenth year of Hongwu in the Ming Dynasty (the eleventh lunar month) it was restored. On February 1, 1960, the territory of Xinjin County Incorporated into Dayi County. On March 25, 1962, the establishment of Xinjin County was restored. Since the establishment of the county, Dayi County has always been governed by present-day Jinyuan Town. As early as the Neolithic Age, there have been human activities in today's Dayi County. In the Zhou Dynasty, there was ancient Shu. The area of ??present-day Dayi County was the territory of ancient Shu. In the fifth year of King Shenjing of Zhou Dynasty, which was the ninth year of Qin Hui Gengyuan (316 BC), the area of ??present-day Dayi County was Lin. Qiong County. In the fifth year of Emperor Gaozu of the Han Dynasty (202 BC), Bashu was pacified. The area of ??present-day Dayi County was Jiangyuan County and Linqiong County. At the end of the Western Han Dynasty, Wang Mang established the new country (9-23 AD) and Linqiong County was changed to Jianqiong. Jiangyuan County was changed to Qiongyuan County. Later, Gongsun Shu named Jingjia in Shu (25 to 36), and the county name of Jianqiong and Qiongyuan remained. In November of the 12th year of Jianwu in the Eastern Han Dynasty (36), Jingjia died. The county was renamed Jiangyuan County, and Jianqiong County was renamed Linqiong County from the beginning of Shuhan, Wei, and Western Jin Dynasty to the second year of Cheng (Han) Yuheng (312), and the Dayi County area was still established in the third year of Yonghe (347) of the Eastern Jin Dynasty. , Cheng (Han) died. Hanyuan County was changed to Rongxian, and later it was renamed Jiangyuan County. After passing through Song and Qi Dynasties, the two counties remained unchanged until King Wuling of Liang Dynasty took over Shu. At the end of the Liang Dynasty, King Wu Ling Xiao Ji took control of Shu (552 to 553), and Linqiong County was changed to Yizheng County, and Jiangyuan County was still established. In the second year of Liang Chengsheng (553), the Western Wei Dynasty separated some areas of Shu. Linqiong County and Jiangyuan County were established in the first year of Emperor Xiaomin of the Northern Zhou Dynasty. Jiangyuan County was changed to Duorong County, and later to Jinyuan County. In the Sui Dynasty, Today's Dayi County area includes Jinyuan, Linqiong, and Yizheng Counties. In the first year of Wude (618) of Tang Dynasty, Jinyuan County was divided into Tanglong County (620). In the Tang Dynasty, the three counties were divided into Anren County. In the 17th year of Zhenguan (643), Anren County was abolished. In the first year of Xianheng (670), Anren County was restored. When the present Dayi County area was not established in the early Tang Dynasty, it belonged to Lin. Qiong, Yizheng, Tanglong, and Anren counties were ceded to the west of Jinyuan County in 671 AD (the second year of Xianheng in the Tang Dynasty) and Dayi County was established in Xiling Snow Mountain. According to "County Chronicles" and "Taiping Huanyu Ji": "The city is vast, so it was named after it." In 1284 (the 21st year of the Yuan Dynasty), Anren County and Huojing County were abolished, and their administrative areas were placed under Dayi County. The territory of Huojing County was later transferred to Qiongzhou. In the fifth lunar month of 1377 (the tenth year of Hongwu in the Ming Dynasty), the territory of Dayi was merged into Qiong County. On July 1, 1960, the 13th year of Hongwu's lunar calendar, Xinjin County was merged into Dayi County, and the original Xinjin County Chengguan Town was changed to Dayi County Xinjin Town. On October 25, the organizational structure was restored, and the area under the original jurisdiction of Xinjin County was still under the jurisdiction of Xinjin County. On October 20, the State Council went through the approval procedures, and Dayi County has always been governed by today's Jinyuan Town. Affiliation: Dayi County. When it was established, it was under the jurisdiction of Qiongzhou. In the first year of Tang Bao's reign (742), Qiongzhou was changed to Linqiong County. In the first year of Qianyuan of Tang Dynasty (758), Linqiong was changed to Qiongzhou. During the Five Dynasties and Ten Kingdoms period, Dayi County belonged to the former Shu Kingdom for 19 years (907 to 926), to the Later Tang Dynasty for 9 years (925 to 933), and to the Later Shu Kingdom for 32 years (934 to 965), it was subordinate to Qiongzhou. From the third year of Qiande in the Northern Song Dynasty (965), Dayi belonged to the Song Dynasty, Qiongzhou was changed to Qiongzhou Linqiong County, and Dayi was under the jurisdiction of Qiongzhou Linqiong County. In the sixth year of Baoyou in the Southern Song Dynasty (1258), the Mongolian Empire army invaded Sichuan, and Dayi was placed under the jurisdiction of Linqiong County in Qiongzhou. Shortly after the fourteenth year of the Yuan Dynasty (1277), Linqiong County of Qiongzhou was changed to Qiongzhou. Dayi belongs to Qiongzhou. Sixteen years (1279). Dayi belongs to the Yuan Dynasty. In the 20th year of Yuan Zhizheng (1360), Ming Yuzhen established a peasant regime in Shu. In the 22nd year of Yuan Zhizheng (1362), he proclaimed himself emperor. The country was named Xia, and Dayi belonged to Qiongzhou. In the spring of the fourth year of Hongwu in the Ming Dynasty (1371), Zhu Yuanzhang sent troops to Sichuan. In June, Xia died, and Dayi belonged to the Ming Dynasty and was under the jurisdiction of Qiongzhou. In the ninth year of Hongwu in the Ming Dynasty (1376), Qiongzhou was demoted to Qiong County, and Dayi was placed under the jurisdiction of Jiading Prefecture. In May of the tenth year of Hong Ming Dynasty (1377), Dayi entered Qiong County. In November of the 13th year of Hong Ming Dynasty (1380), it was restored and placed under the jurisdiction of Jiading Prefecture. In the 19th year of Chenghua in the Ming Dynasty (1483), Qiong County was promoted to Qiongzhou, and Dayi was also under the jurisdiction of Qiongzhou. On the eighth day of August in the seventeenth year of Chongzhen's reign in the Ming Dynasty, Zhang Xianzhong conquered Chengdu and established the Daxi Peasant Government, making Chengdu the capital and calling it Xijing. On the fifth day of October, he broke through Qiongzhou and entered Dayi. During Zhang Xianzhong's occupation of Shu (1644 to 1646), Dayi was one of the counties under the jurisdiction of Daxi, and its affiliation was the same as in the late Ming Dynasty. In the third year of Shunzhi of the Qing Dynasty (1646), Dayi belonged to the Qing Dynasty and was under the jurisdiction of Qiongzhou. The "Dayi County Chronicle" published by Qianlong of the Qing Dynasty records that in the sixth year of Shunzhi in the Qing Dynasty (1649), Lu Ming, a subordinate of Zhang Xianzhong, was still "located in Chongqing, Xuzhou, Mahu and Qiongzhou areas". In the ninth year of Shunzhi in the Qing Dynasty (1652), Zhang Xianzhong's subordinate Liu Wenxiu, who had united with the Southern Ming Dynasty, sent troops back to Sichuan, defeated Wu Sangui who had surrendered to the Qing Dynasty, and conquered the southern states and counties in Sichuan. Liu Wenxiu defeated Chengdu. Around the ninth year of Shunzhi in the Qing Dynasty, Dayi belonged to Nanming and was under the jurisdiction of Qiongzhou.
The Guangxu edition of "Dayi County Local Chronicles" in the Qing Dynasty records that after Wu Sangui rebelled in the 13th year of Kangxi's reign in the Qing Dynasty (1674), his headquarters belonged to Wang Fan and captured Dayi in Qiongzhou. Wu proclaimed himself emperor in 1674, and his country was named Zhou. Dayi belongs to Zhou Dynasty and is subordinate to Qiongzhou. In the 19th year of Emperor Kangxi's reign in the Qing Dynasty (1680), Wangping Fan was pacified, and Dayi belonged to the Qing Dynasty and was under the jurisdiction of Qiongzhou. In the first year of the Republic of China, Dayi was placed under the jurisdiction of Qiongzhou. In 2 years, Qiongzhou was changed to Qionglai County, and Dayi was placed under the jurisdiction of Sichuan South Road. In May of the third year, Shangchuan South Road was changed to Jianchang Taoism. In 17 years, the Dao system was abolished, and Sichuan was at the time of warlord fighting. It was not officially abolished until the following year. Dayi was then directly under the control of Sichuan Province. In June 24, Dayi was placed under the Fourth Administrative Supervision District of Sichuan Province. After Dayi County was liberated on December 20, 1949, it was placed under the Meishan Administrative District. In March 1950, it was transferred to Wenjiang Administrative Region. Also known as Wenjiang District, it was changed to Wenjiang District in October 1968. In May 1983, the organizational structure of Wenjiang area was abolished, and Dayi County is still under the jurisdiction of Chengdu City. In 1997, it had an area of ??1,548 square kilometers, a population of 486,000, and jurisdiction over 13 towns and 7 townships. The county government is located in Jinyuan Town. In 1999, Dayi County governed 15 towns and 12 townships: Jinyuan Town, Anren Town, Yuelai Town, Xinchang Town, Tangchang Town, Xiling Town, Xieyuan Town, Dongchang Town, Hanchang Town, Wangsi Town, Sancha Town, Chuyangjiang Town, Shang'an Town, Tiangongmiao Town, Sujia Town; Gaoshan Township, Qingxia Township, Jinxing Township, Wushan Township, Shaqu Township, Heming Township, Sanba Township, Dun Yi Township, Caichang Township, Yuanxing Township, Longfeng Township, and Danfeng Township. In 2000, according to the fifth census data, the total population was 490,373, including: Jinyuan Town 120663 Wangsi Town 27682 Tangchang Town 15886 Xinchang Town 25658 Yuelai Town 15408 Anren Town 22444 Chuyuanjiang Town 9217 Tiangongmiao Town 11001 Xiling Town 9540 Xieyuan Town 9702 Dongchang Town 12518 Hanchang Town 14801 Sancha Town 23021 Shang'an Town 14653 Sujia Town 18982 Qingxia Township 7760 Shaqu Township 15801 Wushan Township 4871 Jinxing Township 9305 Gaoshan Township 7370 Heming Township 11790 Sanba Township 6512 Caichang Township 15897 Dunyi Township 23752 Yuanxing Township 15424 Longfeng Township 12110 Danfeng Township 8605 On September 8, 2004, the Sichuan Provincial People’s Government (Chuanfu Civil Affairs [2004] No. 33) agreed to Dayi County’s cancellation of Tangchang, Two towns in Yuanxing and five townships in Danfeng, Sanba, Gaoshan, Longfeng and Dunyi; Tiangongmiao Town was renamed Huashuiwan Town. The administrative areas of the original Tangchang and Yuanxing towns will be merged into Anren Town; the Anren Town government will be located in Anren Village. The original administrative area of ??Danfeng Township will be merged into Yuelai Town; the Yuelai Town Government will be stationed in Guankou Community. The administrative area of ??the original Sanba Township was merged into Chuyuanjiang Town; the Chuyuanjiang Town government was stationed in Chuyuanyuan Village. The original administrative area of ??Gaoshan Township was merged into Sancha Town; the Sancha Town government was located in Meihua Village. The original administrative area of ??Longfeng Township was merged into Dongchang Town; the Dongchang Town Government was located in Dongjia Village. The original administrative area of ??Dunyi Township was merged into Wangsi Town; the Wangsi Town Government was located in Government Street. In 2004, Dayi County governed 17 towns (Jinyuan, Wangsi, Chuyuanjiang, Xiling, Xieyuan, Dongchang, Hanchang, Sancha, Shang'an, Sujia, Xinchang, Anren, Yuelai, Qingxia, Shaqu, Caichang, Huashuiwan), 3 townships (Wushan, Jinxing, Heming), 20 community committees, 345 village committees; area 1,545 square kilometers, population density 322 people/square km.