  Classical thermodynamic theory still holds true in subsystem that is a
percolation connected by 8 orders of self-similar 2-body-3-body coupling
clusters. The fixed point, $B_2^* \equiv 3/8$, for the clusters of different
size, existing in reduced second Virial coefficients has been proved by scaling
theory in percolation field. It is shown that, if $B_2^* \equiv 3/8$ is
combined with $B_3^* \equiv 5/8$, the potentials of 2-body-3-body coupling
clusters, in critical local cluster growth phase transition, balance the
kinetic energy in the glass transition. It is also proved that the glass
transition corresponds to the regime in which the chemical potentials in all
subsystems hold zero.
