  In this paper, we study the symplectic geometry of singular conifolds of the
finite group quotient $$ W_r=\{(x,y,z,t)|xy-z^{2r}+t^2=0 \}/\mu_r(a,-a,1,0),
r\geq 1, $$ which we call orbi-conifolds. The related orbifold symplectic
conifold transition and orbifold symplectic flops are constructed. Let $X$ and
$Y$ be two symplectic orbifolds connected by such a flop. We study orbifold
Gromov-Witten invariants of exceptional classes on $X$ and $Y$ and show that
they have isomorphic Ruan cohomologies. Hence, we verify a conjecture of Ruan.
