As shown in the picture below, the smoother side of this surface is the front:

In order to achieve a positive and negative contrast, the following will give a picture of the back of the pork belly, and explain it in detail. How to clean the dirty side of pork belly:

Tools required: flour.

1. First, turn the pork belly upside down. It can be seen that there is a lot of mucus on the folds on the back of the pork belly, which is easy to distinguish from the front. The reverse side needs to be cleaned with flour.

2. Get a bowl of flour.

3. Sprinkle on the back of the pork belly.

4. Knead it with your hands. You can see that mucus and dirt are adhered to the flour.

5. When the rubbing is almost done, put it in the basin and wash it.

6. When washing, you can see that the flour sticks the dirt into a lump, which makes it easier to clean.

7. Wash it again with clean water.

8. In this way, the mucus and dirt are removed cleanly, and the effect is good.