Need. Sanyuan, known as "Jiayi" in history, belongs to Xianyang City, Shaanxi Province, and was called "Chiyang" in ancient times. Located in the middle of Guanzhong Plain, it is named after Menghouyuan, Fengyuan and Bailuyuan. It is necessary to do nucleic acid testing in Sanyuan County on June 5438+1October 65438+1October 0, 2022, because it is a low-risk area and has not yet entered the normal state of prevention and control. Sanyuan is located in the arc center of large and medium-sized cities around Xi, Xianyang, Weinan and Tongchuan. Lintong, Fuping and Yanliang in the east, Gaoling in the south, Jingyang and Chunhua in the west, Tongchuan New District and Yaozhou District in the north. It is the core area of Guanzhong plain urban agglomeration and the north gate of the provincial capital Xi.