The ancients put it in a coffin after they died. Why do coffin lids need nails? What do you think of this?

Coffin is the resting place of the dead and the home of the ancients. Now that the city is cremated, the city no longer buries people in coffins, but directly becomes urns, so many rules have been changed or even lost, and there are no rules about coffins at all. So now people in the city basically don't know a lot about coffins, and they should only know the existence and basic function of this thing.

The real source of the coffin is hard to find, and the inventor has no historical records at all. The coffin probably came from the most basic initial state of the Neolithic Age. At that time, it belonged to primitive society, fighting fierce birds and beasts for living space. At that time, human beings actually had no advantages, coupled with low productivity and short life span, and people were thrown into the wilderness first after death.

Later, because I couldn't bear to see my companion's body being eaten and destroyed by wild animals, and I couldn't bear to see the bones exposed to nature, I dug a pit and buried the body underground. In order to prevent the destruction of insects, I wrapped a straw bag outside the body. This is the most primitive coffin. Later it developed into wooden coffins, as well as sarcophagi and bronze coffins. Wooden coffins are the most common, and eventually the coffins become the beds of the dead. Because of musheng, the ancients said that a corpse can be turned into a fairy, and it needs to be alive to maintain the body.

In fact, the original meaning of the coffin is to protect the body and prevent it from being destroyed. Later, it evolved into ostentation and superstition. In slave society and feudal society, coffins are regarded as a symbol of pursuing immortality and identity. Putting the body in the coffin is actually to protect the body. Later it gradually evolved into other meanings. The spread of ghost culture is the definition of early feudal society by slave society.

In general, coffins can't be made of any metal. Of course, special cases like bronze coffins are rare. Under abnormal circumstances, normal wooden coffins cannot be made of metal. There is no metal nail in the whole coffin, and it is completely bonded with mortise and tenon structure. Even if the final conclusion is made after collection, it is basically sealed with glue and wax, and the coffin lid is not fixed with metal nails.

After closing the coffin, tie the lid with rattan and bamboo to prevent it from falling off. Usually tied horizontally for three times, once in front, once in the middle and once in the back, and then buried at the funeral counter. Only in some special circumstances will metal nails be used, such as some very dead people, who are regarded as unlucky people and need metal nails to cover them. In fact, it is the traditional method of suppressing evil spirits and gathering qi. Metal nails are used because they are sharp weapons and have the function of sealing ghosts.

Another situation is to use nails, which is a problem of local customs. In some places, seven nails are nailed to the coffin lid before burial. The first nail must be nailed by a family member, followed by a special person, and only seven nails were nailed, which means that the descendants of Zefu. This custom actually exists in some areas. In most areas, metal nails are not used in coffins, and there are sharp tools in coffin beds, which is disrespectful to the dead.