This internal affair inadvertently blames my translation.

There is a doctor who claims to be good at surgery. An assistant commander came back from the front line and was shot by random arrows. The doctor cut off the arrow with scissors and asked for a reward. The deputy commander said: the arrow is still in the muscle, please treat it first. The doctor said: this is a matter of internal medicine. You shouldn't ask me. The deputy commander said: Alas, there are such fraudsters in the world.