1. Wash pig's feet, scrape off fine hairs, cut into pieces, pick them up and put them into water;

2. Fresh yam is peeled and washed, cut into pieces and soaked in clear water to prevent browning;

3. Wash Angelica sinensis, Fructus Lycii and Fructus Jujubae, pat the Fructus Jujubae flat and remove the core;

4. Boil the water in the casserole, add all the ingredients, boil over high fire, turn to low heat for two hours, and season with salt.