Excuse me, where does the sand river in Gukai Township, Nayong, Bijie originate? Urgent!

I opened the Shahe River. As for the birthplace of this river, I don't know, because it flows from a mountain, no one has seen where it once flowed and then flowed into the underground Shahe, and no one has carefully observed it. Because this river reaches Shahe, it is completely a mountain. Besides using advanced instruments, how do ordinary people know where it flows?

According to the old people in the village, the river dried up for twelve hours more than ten years ago. At that time, there were many kinds of fish in the river, but they all died. As for many questions about this river, I'm not sure, so I won't talk nonsense here. If you really want to know about this river, you should take a trip to Gukai Shahe in person!