Introduction to the second exhibition hall: The west verandah of the second entrance to the courtyard is the second exhibition hall. It mainly introduces the architectural achievements of Qin Xianyang Palace No. 1, 2 and 3, focusing on the brick building materials, palace murals, copper components and drainage facilities, refrigeration facilities, heating facilities and other architectural achievements of the palace ruins. The main exhibits include: hollow bricks with the water god riding a phoenix, hollow bricks with dragon patterns, floor tiles, well rings, cellar bottom basins, Qin ruins tiles, four-horse carriage murals, funnels and drainage pipes, etc.