  T violation should be tested independently of CP violation. Besides K system,
B meson decays provide another good place to study T violation. In the Standard
Model, T violation in $B^0 \rightleftharpoons \bar{B^0}$ oscillation is
expected to be small. The angular distribution of $B\to VV$ decay permits one
to extract the T-odd correlation. In the absence of final state interaction, T
violation in $B\to J/\psi(l^+ l^-) K^*(K_S\pi^0)$ decay can reach $4-7%$ via
$B^0-\bar{B^0}$ mixing.
