Introduction to Yezu Square: The square is 117 meters long and 117 meters wide. There are 8 merit pillars in the square, each 9.9 meters high and 1.26 meters in diameter at breast height. The pillars are embossed with the lifelike eight meritorious deeds of Emperor Yan Shennong, including making grass, planting grains, tasting herbs, and promoting trade.