The extended meaning is also very clear, that is, stop the war, the soldiers put down their weapons and enter a state of rest. Later, with the change of time, sharp characters began to take a break. The meanings of ancient Chinese characters in China are quite different from those of modern Chinese characters in some glyphs.
In addition to this explanation, there are usually two other explanations, namely:
First, we often say that "pinching" means "sending the tip of the tongue", because the human tongue is the most critical organ, knowing the sour and knowing the sweet, and the taste is bitter and loving the meat. The word pinch is often used for pedestrians who are in a hurry, because they can only eat a little food in a hurry. Giving them tongues casually is perfunctory, that is, eating something, so pinching is handled during the trip.
Some people also say that this statement comes from the nomadic minority Qiang nationality. After eating a meal in the morning, Qiang people tend sheep outside at noon and don't go home for dinner. Instead, they make do with steamed bread and cakes, which is called "pinching" and later became popular.
Second, there are typos. Originally, it was a fire, and it was a fire to cook. Later, because fire and fire are very similar, slowly lighting the fire to cook evolved into a point, which also means eating.
There is also an unrecognized saying that it is slang for outlaws, which is not used by ordinary people. Later, ordinary people followed suit and learned it.
I think only the first one is more credible.