Give some practical suggestions:

When making ginger vinegar pig's feet eggs, if you want to dissolve more calcium in vinegar, you can first buy half a catty of pig's spine or pig's fan bones (not so fat) and put them in sweet vinegar for a period of time (5-1 days), and put them aside after boiling every day, so it is not necessary to stew them on the fire for a long time. Eggs should be put before pig's feet, and pig's feet should be put last. If it is cooked in a big pot, the eggs should be picked up and stored in the refrigerator when they are not eaten, so as to avoid excessive calcification (stiff and bouncing). On the one hand, the taste is not good, and on the other hand, it is difficult to absorb.