At 7 o'clock that night, "Neil" started the live broadcast of aerobics as usual, and the time was traced back to 7: 35. "Neil" suddenly left the live camera when he was interested in jumping, and then fell to the ground. Du Huan, an orthopedic nurse in our hospital, heard the sound nearby and immediately went to check it out. At the same time, she shouted "Neil" and there was no response. When her spontaneous breathing disappeared and the carotid pulse disappeared, she was immediately judged as cardiac arrest, and the patient was immediately given cardiopulmonary resuscitation until 65433.