Towel mouth township, belonging to Wuning County, Jiujiang City, Jiangxi Province, is located in the eastern part of Wuning County, surrounded by water on three sides, bordering Guanlian Township in the east and north, Songxi Township in the west, and Luoping Township in the south across the Zhelin Reservoir. The administrative area covers a total area of 89.77 square kilometers. As of the end of 2019, Towel Mouth Township had a household population of 9,667.
In the old days, the territory of Towel Mouth Township belonged to the Sixth and Seventh Capitals of Anle Township; in September 1984, it was changed to Towel Mouth Township. As of June 2020, there are 5 administrative villages under the jurisdiction of Jiankou Township. The People's Government of the township is stationed at Towkou Street.
As of the end of 2019, there are 4 industrial enterprises in Jiankou Township; there are 7 general stores or supermarkets with business area of 50 square meters or more.