Introduction to the non-frozen river: It is located in the middle section of the Halaha River, 74 kilometers away from the hot spring street in Aershan City. It is about 20km long from Santan Gorge to the vicinity of Jinjianggou Forest Farm. The river does not freeze in winter and flows naturally. , amazing. In the severe winter, when the temperature is below -30°C, the river in this section is steaming and gurgling. There are even green aquatic plants growing in the water in this section of the river, reflecting the afterglow of the setting sun and overflowing with color, like colorful clouds, which is spectacular.