1. First find a pair of scissors and cut off the fat outside the fat sausage. If you don't have scissors, you can scrape them off with boning knife or tear them by hand.

2. After removing fat and grease, fill the large intestine with water first. Then find a chopstick, push the skin in from the opening of the intestine, turn the inside of the intestine to the outside, or cut the large intestine directly along the intestine with scissors.

3. Then add some flour and salt to the basin, add a little water, and rub the pig's large intestine repeatedly until a large amount of glue is produced. Then rinse with clean water. If there is no flour, you can cook with raw flour. If not, you can use salt.

4. Then add a little water with cooking wine or white vinegar, knead it again, and finally rinse it off.