Complex sentence: During the Spring and Autumn period, the capital of the Xianyu Kingdom was located in the area, since the year 256 (Western Jin dynasty), the "Changshan Prefecture" was established in the County.
Split into simpler sentences: During the Spring and Autumn period, the capital of the Xianyu Kingdom was located in the area. In the year 256 (Western Jin dynasty), the "Changshan Prefecture" was established in the county.