Matter is the Representation of Space-Time
The continuous flowing space time forms a space time group G, one of its fundamental groups is the Poincare group PO (1,3) and the matter and interaction fields are representations of its intrinsic space time group. As a kind of quantized spacetime unit, space-time group elements generate both space-time manifolds and matter. Matter and fields are aggregates of the quantum space-time within them and determine their type: The Lorentz group SO(1,3) represents a rotating space time corresponding to visible matter and the translation group P1,3 represents a translational space time corresponding to dark matter and dark energy. The aggregation mode of space-time degrees of freedom in matter reveals that charge conjugation symmetry is the inverse symmetry of internal time of charged particles and the external parity breaking of neutrinos is also due to their internal spatial aggregation mode.