Why is logistics packaging divided into general packaging and special packaging?

Why is logistics packaging divided into general packaging and special packaging?
General packaging:
The goods shall be packed firmly and in good condition to prevent package breakage, leakage and loss of contents during transportation; Prevent goods from damage or deterioration due to stacking, friction, vibration or changes in air pressure and temperature; Prevent injury to operators, ground equipment and other objects.
In addition to being suitable for the nature, state and weight of the goods, the packaging shall also be convenient for handling, loading and unloading and stacking; The outer surface of the package shall be free of protruding nails, hooks, thorns, etc; The package shall be clean, dry and free from peculiar smell and oil stain.
The advanced materials (such as wood chips and paper chips) in the package shall not be leaked. Except for the goods packed in paper bags (such as documents, materials, etc.), the consigned goods shall be bundled with packing belts. It is forbidden to use straw bags or straw ropes to bind goods.
The packing belt used for binding the goods shall be able to bear the full weight of the goods and ensure that the goods will not be disconnected when lifted.
If the packaging of the goods does not conform to the relevant provisions of this manual, the shipper shall be required to improve or repack the goods before they are accepted for transportation.
Special packaging:
(1) Liquid cargo. There must be 5-10% gap inside the container, and the cover must be flat and tight; Do not spill. The liquid contained in glass containers shall not exceed 500ml. The gross weight of a single piece of goods should not exceed 25kg. The box shall be filled with gaskets and absorbent materials to prevent shaking or liquid seepage.
(2) Powder cargo. If the goods are packed in bags, plastic coated textile bags shall be used as the outer packaging to ensure that the powder will not leak out, and the gross weight of a single piece of goods shall not exceed 50kg; If it is packed in cardboard barrels, wooden barrels and plywood barrels, the barrel body shall be unbroken, the seams shall be tight, the barrel cover shall be sealed, and the barrel hoop shall be firm and solid; If glass is used, the weight of contents in each bottle shall not exceed 1kg. Iron or wooden materials shall be used as the outer package, and the box shall be filled with padding materials. The gross weight of a single piece of goods should not exceed 25kg.
(3) . Precise and fragile goods. The gross weight of a single piece of goods should not exceed 25kg. The following methods can be used for packaging:
Multilayer packaging: goods - liner materials - inner packaging - liner materials - transport packaging (outer packaging).
Suspension packaging: Several springs or ropes are used to suspend the goods in the middle of the box from all directions of the box.
Anti inversion packaging: packaging with a large chassis and a handle ring or ridge type box cover; Such packaging must be used for glass plates and wind shields that are not suitable for horizontal placement.
Packaging of glassware: foam plastics and other cushion materials with sufficient thickness shall be used to tightly wrap the glassware, and solid corrugated paper boxes or wooden boxes shall be added. The articles in the boxes shall not shake.
(4) Naked goods and goods that are not afraid of collision. Packaging is not required, such as tires; For goods that are difficult to count, irregular in shape, similar in appearance to transportation equipment, or easy to damage the aircraft, they should be wrapped with ropes and sackcloth or packed additionally.
(5) Large cargo. The bottom of goods with large volume or weight shall be equipped with sleepers or bottom brackets that are convenient for forklift operation.