  We investigate the 2D t-J model at a hole doping of $\bar{n}_h$=1/8 using
recently developed high accuracy fermionic projected entangled pair
states(fPEPS) method. By applying stochastic gradient descent method combined
with Monte Carlo sampling technique, we obtain the ground state hole energy
$E_{\rm hole}$=-1.6186 for $J/t$=0.4. We show that the ground state has stable
diagonal stripes instead of vertical stripes with width of 4 unit cells, and
stripe filling $\rho_l$=0.5. We further show that the long range
superconductivity order is suppressed at this point.
