In the past, a man claimed to be "a specialist in curing hunchbacks". His signboard read: "I specialize in curing hunchbacks. No matter whether you are hunchbacked like a bow, a shrimp, a basket for rinsing rice or a rice pot, I guarantee that once I start treatment, your hunchback will be cured."
One hunchback saw the signboard, believed it to be true, and asked for treatment.
The doctor neither gave any prescription, nor let the patient take any medicine. All the medical instrument he had was two boards for pressing. One board was put on the ground, on which the hunchback was told to lie on his stomach. Another board was pressed on and tied tightly with the hunchback. Then the doctor jumped onto the board and trampled upon it at random with all his might. As a result, the hunchback was straightened, but, alas, he was "dead and gone" also.
When the hunchback's son learned of this, of course he had it out with the doctor. But the doctor said: "My job is to straighten his back. It's none of my business whether he is dead or alive."