Chevrolet Optra 2004 Owner's Manual page 12

But do not have a seatback reclined if your vehicle is
moving.
1-6
CAUTION:
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Sitting in a reclined position when your vehicle
is in motion can be dangerous. Even if you
buckle up, your safety belts can not do their
job when you are reclined like this.
The shoulder belt can not do its job because it
will not be against your body. Instead, it will be
in front of you. In a crash you could go into it,
receiving neck or other injuries.
CAUTION: (Continued)