2. Cattle are ruminants and have four stomachs. The first three stomachs are esophageal variations, namely rumen (grass belly), reticular stomach (honeycomb stomach, hemp belly), valved stomach (double-valved stomach, louver), and the last one is abomasum. The meat column on the inner wall of rumen is commonly known as "belly collar, belly beam and belly kernel", and the meat is thick and tough, commonly known as "belly tip" and "belly head". Rumen can tear off the serosa of cattle, keep mucosa and eat slices raw, such as "beef omasum hotpot" and "husband and wife lung slices".