Introduction to Exhibition Hall 1: The theme of Exhibition Hall 1 is the investigation of mineral deposits: Datong coal has long been famous for its excellent quality and abundant reserves. The Japanese invaders had been coveting it for a long time. As early as the early twentieth century, they secretly investigated the Datong Coal Mine in the name of "inspection, visit, and visit" and made plans to make preliminary preparations for plundering the Datong Coal Mine.