To **restore blood circulation** in an injured person who is not breathing normally, the **cardiopulmonary resuscitation (CPR) technique** should be used. This technique is essential when the heart is not functioning properly and the person is not breathing normally.

- **Cardiopulmonary resuscitation** involves performing compressions on the chest of the affected person. The hands are interlocked and placed on the chest, and compressions are performed up and down at a rate of approximately 100 times per minute.

- Additionally, **mouth-to-mouth ventilations** should be performed every 30 compressions to ensure that air enters the injured person's lungs. This helps maintain the flow of oxygen in the body until emergency services arrive.


This technique is crucial for maintaining blood circulation and oxygen supply in emergency situations, which can be vital for the survival of the injured person.