Gao'an (Chinese: 高安; pinyin: Gāo'ān) is a city in the province of Jiangxi, China. It is a county-level city, under the jurisdiction of the prefecture-level city of Yichun. Gao'an is located about 35 kilometers west from Nanchang, the capital city of Jiangxi province. It covers an area of 2439.33 square kilometers and has an estimated population of 1 million people. In 1993, it became a city comprising 20 smaller towns. It is well known for calligraphy and a thriving ceramics industry.
In 4 A.D., Jiancheng County was changed into Duoju County, and then named Jiancheng again in 25 A.D. From 184 to 189, a part of Jiancheng was marked out to Shangcai County (now Shanggao County). In the late Eastern Han Dynasty (4 A.D.), under the "Three Kingdoms" situation, and Jiancheng County belonged to Sunwu power. From 22 to 228, respectively marked out a part of Jiancheng and Shangcai to be Yicheng County and Yangle County (now Wanzai County).
During Jin and Southern Dynasties, Jiancheng County still belonged to Yuzhang Shire. In 589, Sui Dynasty united the country, abolished Shangcai, merged Yangle, and then Yicheng belonged to Jiancheng again. At that time, Jiancheng County was changed into Hongzhou.
In 622, in order to avoid the name to be same with the Prince Li Jiancheng, the county was named as Gao'an. According to Taiping Huanyuji (《太平寰宇记》), "the terrain is high but flat, so name it Gao'an" (“地形似高而安，故名”). (Gao in Chinese means high, An in Chinese means flat.) In 624, Gao'an belonged to Yunzhou.
During five dynasties and ten states period, Gao'an belonged to Wu power at first, but was administrated by Nantang power later. In 981, marked out a part of Gao'an and Shanggao to be Xinchang County (now Yifeng County). In 1225, because the "Yun" in Yunzhou was the same pronunciation with the emperor Zhao Yun, and also at that time found a previous ganoderma lucidum in the mountain, which was regarded as a very auspicious sign, and then the name became Ruizhou ("Rui" in Chinese means auspicious sign). Therefore, Gao'an belonged to Ruizhou.
In 1932, the whole province was divided into 13 administrative regions, and Gao'an belonged to the first region. In 1935, there were 8 administrative regions, and Gao'an became one of the second region. In 1942, it adjusted to have 9 administrative regions, and Gao'an belonged to the first one again. On July 10, 1949, Gao'an got liberated. 4 days later, Gao'an government was established, and belonged to Nanchang, Jiangxi province. Later on,Gao'an belonged to Yichun.
On December 8, 1993,the state council approved Gao'an to be a prefecture-level city, and governed by Yichun.
Gao'an is located in the northwest-central of Jiangxi province, and belongs to [Middle-lower Yangtze Plain]. It covers an area of 2439 square kilometers. 
The northern terrain in Gao'an is high, the southern is low, and the middle part is flat with hills, valleys and plains.The area of hills is 926.915 square kilometers, which is 38% of the total area. Water area is 254.343 square kilometers, which occupies 10.4%. The altitude is between 40 and 100 meters. The north has extension of nine ridge mountains,the south has extension of Mengshan and Moshan,and the south-center has Heling and Fengling.Hua Linsaiin the north is the highest point in Gao'an, with the altitude of 800 meters. 
The mainly rivers are Jinhe and Xiaojiang. Jinhe flows from west to east,winding to the center of the city,arrives in Xinjian County and flows into Ganjiang finally. Xiaojiang passes the edge of the south,arrives in Fengchen and also flows into Ganjiang.
Gao'an is subtropical monsoon climate with four seasons, abundant rainfall, sufficient sunlight and long period of Frost-free.The annual average rainfall is 1560 mm. Rainy days are mainly between April and July, and the rainfall takes over 60% of the total, but it is easy to cause floods. From August to October, the rainfall is less and drought is easy to happen. The temperature varies from -10.7 °C to 40 °C,and the average temperature all around year is about 17.7 °C. 
It is located in Hualin Mountain of Gao'an,which is about 62 kilometers away from the city.It is the highest point of the whole city. 
Hao Helou is a special architecture in Taiyang town, which is 47 kilometers away from the city center. This building was founded in late period of Ming Dynasty.It is famous as its special structure. 
It stands at the north bank of Jinjiang, and also at the front of the government building. It was established in Tang Dynasty,with lots of reconstructions, finally in 1985,it became an important scenic spot. 
The local specialty is Fuzhu(腐竹）.It has a long history because of the excellent soybean ingredient and special water quality of Jinhe. Gao'an fuzhu is of good quality, rich nutrition, and becomes national, provincial and municipal honor products. The product is sold in more than 20 provinces and cities, and enters the international market, even some products have been sold to the United States, Kuwait and other countries.  
The population of the district was 785,705 in 1999.
Notes and references
- (Chinese)"Gaoan." Retrieved June 18, 2014.
- (Chinese)"Hua Linsai". Retrieved June 13, 2014.
- (Chinese)"Hao Helou". Retrieved June 13, 2014.
- (Chinese)"Da Guanlou". Retrieved June 13, 2014.
- (Chinese)"Gao'an Fuzhu" Gao'an Fuzhu's Archives. Retrieved June 13, 2014.
- (Chinese)"Fuzhu" Gao'an Fuzhu's Archives. Retrieved June 13.2014.
- (English) National Population Statistics Materials by County and City - 1999 Period, in China County & City Population 1999, Harvard China Historical GIS