What on earth is a wooden cow or a flowing horse?....

Personal opinion: The wooden ox and flowing horse are a relatively complex transportation machinery in ancient times. As the name suggests, it is made of wood (for two reasons, one is: the ancients did not give random names, the word "木" should refer to the material, otherwise it is difficult to explain why the word "木" is used; the other is: there are not many other materials to use. At that time, the metal forging ability was low, and a large amount of metal would not be used to make such machinery. Wood was a relatively easy-to-obtain and practical material. In addition, it is difficult for me to imagine how to use cloth to make transportation machinery. ), looks like a cow or a horse, and flow indicates the form of its work or action.

Personal guess: It has parts similar to tank tracks, which can make it easier to walk on rough roads. It has a relatively complex gear combination structure inside, which can improve its own mobility. And the factor of gravity was taken into consideration during the design, so that it can utilize the gravity of itself and the load when working, thus reducing the demand for external force. It is difficult to understand that it does not rely on external force to move at all, because in ancient times at that time, there were not many natural forces that the ancients could use, such as gravity, wind or water power, and they should not have reached the point of using steam or electricity.