The core content of the space-time ladder theory: the origin of the universe is dark matter, which is the energy field. The polarization of dark matter produces contracting matter and expanding dark energy. Matter continues to contract, gradually forming gravity, weak force, electromagnetic force and strong force. At the same time, dark energy continues to expand, gradually forming gas space-time corresponding to gravity, Shen space-time corresponding to weak force, virtual space-time corresponding to electromagnetic force, and Tao space-time corresponding to strong force.

Matter contracts in an equiangular spiral manner, and dark energy expands in an equiangular spiral manner. The contraction of matter corresponds to the expansion of dark energy, which is the core of the space-time ladder cosmology.

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