The current invention provides a ladder, which may be an additional element related to mining, construction, transportation, or any other technology industry related to the lifting of goods. The water tank includes: a flat surface, i.e. the surface connected with the shelf, which can make the shelf more stable when moving; a flat surface, which is located on the opposite side of the flat surface, can move any coupling element more easily. There are wires between the two surfacesEach has a certain number of angles, extending longitudinally to the length of the whole lifting rod to avoid sliding of the coupling element; another ear (7) is located at one extreme to avoid bending of the giant panda and make the goods more stable.
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