Anyang River, also known as Huan River, was formed in which period? Where is the source? Where does it end?

Huan River, originated in Lvlinshan, Lin County. Huan River has three main tributaries: Huanghua River, Lingyang River and Taoyuan River. The sources of the three tributaries are all on the fault zone of Lv Lin Cliff Fault. After flowing down the mountain, two tributaries of Huanghua River and Lingyang River meet in Beilingyang Village, Linxian County. Flowing eastward to Hengshui Village, Hengshui Town, Linxian County, there is Taoyuan River. Then continue to flow eastward to Guojiayao Village, Hengshui Town, undercurrent underground, exposed in Shan Ying Mountain, Anyang County. Therefore, there is a saying in history that Huan River "advances when crossing, and comes out when it is good". From Shan Ying Mountain to Zhangwu Village, the river is located in the hilly area, with large natural drop and rapid flow. Since Zhangwu village, the river has been in the plain area, and the flow trend has gradually stabilized. In the east of Jiangcun Township, Anyang County, Zhuquan River is injected. To the east of Mashui Village, Fenhong River flows into it. Then, it winds eastward to Fanyangkou, Neihuang, and flows into Weihe River.