2. Cut the urethra at the root of the whip with a knife.

3. Remove the leather membrane (the part that can be picked up) from the bullwhip.

4. Cut the urethra of the bullwhip (red position) and cut it to the head.

5. The urethra can be torn off by hand or scraped clean with a knife, cut into 4-5 sections and put into a basin for cleaning.

6, Niu Bao cut off the outer skin membrane, revealing the blood vessels inside.

Step 7 finish