The correct posture should be to check the surrounding environment and call the police immediately 120 to see if the environment is safe (think about it, if you are in the middle of the main road and cars are coming and going, you may accidentally miss or get an electric shock. First of all, make sure that there is no electricity leakage around that person, otherwise you will definitely get an electric shock), then unbutton the patient's shirt collar and keep breathing smoothly, and call the patient to see if there is any response (although generally there will be no response). In short, don't move the patient before the professional arrives, so as not to cause secondary injury. Lift the patient's chin and let his airway open for breathing.

When chest compressions are performed, kneel on the patient's side, hold down the middle of the patient's sternum with one hand, slide the other hand along the ribs, touch the bony process in the chest and abdomen with your fingertips, put your hand on the middle of the sternum above the bony process (about 1/3 in the chest), and press with your hands crossed.

It is necessary to press regularly and step by step, and the regular intensity should be consistent, neither fast nor slow, and it should be steady and uninterrupted, otherwise it may lead to changes in cardiac output and aggravate the condition. At the same time, you can do four or five artificial breaths and then observe the patient's condition, and then observe it every five minutes or so. The interruption time of each exam should not exceed 10 second. Once the patient gets better, let the patient lie on his side and breathe. When you see the chest ups and downs, artificial respiration is effective! Don't panic when giving first aid, keep calm and count the time by yourself. Be sure to call a professional team before doing it for a long time, and then do artificial respiration chest compression after the call.

Also, if there are other people around, then everyone should work together with Qi Xin to check that there is no danger in the surrounding environment, so that one person can call for help and the other person can help the injured. In the face of an emergency, calm down and remember the knowledge of emergency rescue. Whether you help a familiar friend or a stranger, it is very likely that you will save a life in the end because of your emergency action.