2. Wash the cavity bone with clear water. Soak Cordyceps sinensis, Euryale Semen and Lycium barbarum in clear water for about 2 minutes, then wash and drain for later use. Sweet corn is cut into small pieces.
3. Put the cavity bone into the soup pot, add enough water, do not cover it, and heat it on high fire. After a few minutes, skim off the floating foam with a spoon, add Cordyceps sinensis, Euryale ferox, Lycium barbarum and scallop, and turn to low heat 1 hour.
4. After adding corn pieces, continue to simmer 1.5 hours and add salt.