Introduction to the Gold Grottoes of the Tang Dynasty and Song Dynasty: The Gold Grottoes of the Tang Dynasty and Song Dynasty are the ones with the largest mining scale and the best preserved remains discovered in China. They were excavated from the mysterious ancient mines of gold and silver mines thousands of years ago and passed through China. The National Key Laboratory of Seismological Bureau conducted carbon 14 determination on the accumulation layer in the mine. The earliest mining date can be traced back to the early Tang Dynasty.