  We have investigated the late-time asymptotic solutions, attractor, and
focusing behavior of minimal causal spin hydrodynamics in Bjorken expansion.
Using the method of dominant balance, we derive the late-time asymptotic
solutions of the evolution equation for spin density and identify the specific
conditions necessary for the spin density to exhibit a power-law decay. We then
analyze both the late-time and early-time attractors for the decay rate of spin
density. Additionally, we report the focusing behavior in spin hydrodynamics,
which has not been found in conventional relativistic hydrodynamics in Bjorken
expansion. Our findings suggest that spin density can be treated as a
conventional hydrodynamic variable at late times under certain conditions.
