According to the postal code database, the postal code of Taojiang County, Yiyang City, Hunan Province is 4 13400, with the first two digits 4 1 representing Hunan Province, the third digit 3 representing Yiyang City, the fourth digit 4 representing Dataojiang County, and the last two digits 00 representing specific delivery areas.

Taojiang County is a county under the jurisdiction of Yiyang City, Hunan Province, located in the middle and lower reaches of Zijiang River, with a total area of 2068. 15 square kilometers, and governs 13 towns and 2 townships. The terrain inclines from southwest to northeast. Zijiang River is the main river system in China, and the main rivers are taohuajiang, Fuxi and Xi Zhi. It is a subtropical continental monsoon humid climate with frequent cold waves in spring and obvious rainy season.