Bones soup: clean the bones, chop them into three or four pieces, then put them in a pot with cold water, boil the bleeding foam and skim off the floating foam. After skimming a few times, add enough boiling water. Add ginger slices, longan, mushrooms and shrimps, and simmer 1.5-2 hours. Add salt, chopped green onion and monosodium glutamate according to the taste when cooking.