Introduction to the Heaven Sacrifice Etiquette Hall: The Heaven Sacrifice Etiquette Hall is located in the west side hall of the Hall of Prayer for Good Harvests. The museum focuses on the evolution of the Heaven Sacrifice Etiquette in China, focusing on the etiquette of the Heaven Sacrifice Ceremony in the Qing Dynasty, including the Heaven Sacrifice Etiquette. utensils, procedures for offering sacrifices to heaven, etc. Among them, the picture of the Great Emperor Qianlong in the 13th year of the Qing Dynasty showed for the first time the style of the highest ceremonial guard of the Chinese royal family, which is particularly exciting.