Introduction to the Sacrifice Square: Located in front of the Shennong Hall, it is a rectangular square 59 meters long and 40 meters wide, covering an area of ​​2,600 square meters and paved with granite. In the middle of the second-level platform, there is a stone circular incense burner with a high relief of Nine Dragons and Pearls, 0.98 meters high and 1.2 meters in diameter. It is used for offering incense or burning silk books for public sacrifices. On both sides, there are a pair of Fujian bluestone incense burners carved from solid stone, 3.9 meters high. meters, with a diameter of 1.5 meters and a single weight of 24 tons, ranking first in the country and the best in China.