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How to remove the membrane from pig kidney
The tunica albuginea is the blood vessel of pigs, and this part cannot be eaten.

Treatment method of pig kidney:

First tear off the white membrane on the surface of the kidney. Generally, everything you bought has been cleaned up. When you divide the kidney in two, you will see a white fascia in the center. Take a sharp knife, twist the fascia with your left hand and gently peel it off with your right hand. The white fascia inside the kidney should be completely clean, which is the source of shame smell. After cleaning, rinse it repeatedly under water, rub it with white vinegar a few times and rinse it again.