1. Method 1: Dissolve salt and alum in warm water according to the ratio of jellyfish 500g, salt 50g and alum 5g. After cooling, pour into the jar, then put the jellyfish into the jar and seal it, which can be stored for a long time.

2. Method 2: The jellyfish bought from the market should not be stained with fresh water or dirty things, but should be soaked with salt layer by layer. Store it in a clean jar, put more salt on the top layer and seal it.