The creepy and eerie Cry Valley, where weather changes cause it to "wail"loudly

In Dianyang County, Shaanxi Province of our country, there is a deep and narrow canyon, called "Cry Valley" by people. One day in June 1980, several geological staff passed by the "Cry Valley", which happened to be a rainy day. Dark clouds drifted slowly over the canyon with the mountain wind, and suddenly, a deafening sound of gunfire was heard.