Ma Bao can rub the baby's small heavenly heart (that is, the intersection of thenar, located at the root of the palm, and the intersection of thenar and thenar) and Baihui point (located at the midpoint of the head and the junction of the two ear tips), both of which have the effect of calming the nerves. If the baby doesn't sleep well because of calcium deficiency, in addition to kneading acupoint conditioning, calcium should also be supplemented appropriately. Recently, I heard that from the actual effect, calcium carbonate is the best, followed by milk calcium, and calcium gluconate is almost the same.