Isaiah does not exist in reality and does not belong to any country. Isaya is a fictional place name in the TV series "Fall in Love with Special Forces". In reality, there is no such city. "Fall in Love with Special Forces" was shot in Nanjing and Changzhou, Jiangsu Province. The location of Isaya town is also in Changzhou.
Which country is Isaiah:
"Fall in Love with Special Forces", adapted from the novel of origami ants, "Soft Fingers under Military Suits", is a modern military drama directed by Tian Yi and starred by Huang Jingyu and Li Qin. It will be premiered in iQiyi on June 1, 2021.
"Falling in Love with Special Forces" tells the story of Liang Muze, a special forces officer, and a military doctor who pursued their ideals, fulfilled their duties and missions, and met, knew, and loved each other in early summer.
Changzhou, also known as Piling, Longcheng, etc., is a prefecture level city under the jurisdiction of Jiangsu Province. There are Weidun Neolithic Site, Yancheng in Spring and Autumn, Tianning Temple, Hongmei Pavilion, Tenghua Old Hall, Oriental Salt Lake City, Huaxia Baosheng Garden and other scenic spots in Changzhou.