The tutorial for killing the old turtle is as follows:

1. Turn the old turtle over first, and chop off its head accurately when its head sticks out; Or grab the old turtle's neck with his left hand and pull out the fish head, and cut the turtle's trachea and blood vessels with his right hand and bleed.

2. After the blood is drained, put it in hot water at 7℃-8℃, take it out for about three or four minutes, then cut it from the bone seams on both sides under the skirt of the old turtle, lift the cover, take out the internal organs and wash it with clear water.

3. Finally, put it in boiling water and cook it slightly to remove blood stains, then take it out and wash it with cold water. In addition, after the old turtle is washed, it can effectively remove the fishy smell of the old turtle by coating it with its bile and rinsing it in clear water.

Old soft-shelled turtle, also known as soft-shelled turtle, is rich in high-quality protein, amino acids, minerals, trace elements and vitamins A, B1, B2, etc. It has the delicious taste of chicken, deer, cattle, pig and fish, and is known as "gourmet meat with five flavors".

The turtle is full of treasures, and its head, nails, bones, meat, eggs, gall bladder and fat can be used as medicine. Bielu of Famous Doctors says that turtle meat has the effect of tonifying the middle energizer and benefiting qi. According to Compendium of Materia Medica, turtle meat has many functions, such as nourishing yin and tonifying kidney, clearing away heat and removing blood stasis, strengthening spleen and strengthening stomach, etc. It can treat night sweats due to fatigue, hyperactivity of yang due to yin deficiency, backache and leg pain, diarrhea due to chronic illness, epilepsy in children, amenorrhea in women and dystocia.