1. It is generally recommended that the ratio of pigskin to water should be controlled between 1:2-3. The jelly made according to this ratio is smooth, tender and refreshing.

2. If you don't grasp it well, you can make up for the lack of proportion by adjusting the cooking time. If you have no experience and grasp, it is recommended to add more water and then increase the boiling time until the soup becomes thick enough.