Chevrolet 2008 Optra Owner's Manual page 33

CAUTION:
{
Never do this.
Here a child is sitting in a seat that has a
lap-shoulder belt, but the shoulder part is
behind the child. In a crash, the child would
not be restrained by the shoulder belt.
The child might slide under the lap belt.
The belt force would then be applied right on
the abdomen. That could cause serious or fatal
injuries. The child could also move too far
forward increasing the chance of head and
neck injury. The shoulder belt should go over
the shoulder and across the chest.
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