Sidaowanzi Town, belonging to Aohan Banner, Chifeng City, Inner Mongolia, is located in the western part of Aohan Banner, on the right bank of the middle reaches of the Laoha River, bordering with Saliba Township in the east and north, Xinhui Town in the southeast, Jianping County in Liaoning Province in the south and west, and Songshan District in the northwest, across the river. The administrative area of Sidaowanzi Township covers 317.75 square kilometers.At the end of 2018, Sidaowanzi Township had a household population of 34,467. Qing Guangxu twenty-ninth year (1903), belonging to Jianchang County count Han Zasak Duo Luo County Wangqi small river along the countryside. Xuantong three years (1911), belongs to the right wing of the Aohan Zasak DuoLuo County WangQi. 1956 April, built small river along, four DeTang, black soil YingZi 3 townships, belongs to the Aohan Banner small river along the area. 1958 October, built small river along the commune. 1960 February, merged into wulanzhao commune. 1961 December, re-establishment of the small river along the commune. 1974, the commune authorities moved to the village of sidawanzi. 1984 February, changed to the sidawanzi. In February, 1984, it was changed to Sidaowanzi Town. in January, 2006, Sidetang Township was merged into Sidaowanzi Township. in October, 2019, Sidaowanzi Township has 14 administrative villages under its jurisdiction. The township people's government is located in Sidaowanzi Village. In 2018, there were 5 industrial enterprises in Sidaowanzi Township, including 2 industrial enterprises above scale, and 201 general stores or supermarkets with business area over 50 square meters.