String reportString = '''
1. Nobody, the report to someone
Instruction: The propagation and processing of electromagnetic waves are complicated. There will be false alarms in the actual use of radar, and there will be some influencing factors in the environment, including:

A. Physical disturbance: including air conditioning, fan, motor and other facilities vibration, cats, dogs, mice, birds and other animals passing through, may cause radar misjudgement of the environment.

B. Space electromagnetic wave disturbance, including the possible existence of high-power electrical equipment around the radar, electromagnetic wave intensive places, the simultaneous coexistence of multiple radars and other environmental factors, may also cause radar misjudgement. Such interference items are few in home and office scenes, but more in factories and industrial environments.

C. Power supply disturbance is mainly caused by power supply radar crosstalk caused by associated facilities and equipment in the mains environment, resulting in unstable power supply of radar and resulting in output misjudgement.

2. In the case of human misreporting no one:
A. The presence of a human body beyond the radar test range.

B. The human body is covered by metal, or by extremely thick office desks and chairs.

C. When sleeping, the body cannot detect breathing micro-movements on the side, and may misjudge as nobody for a short time.
''';
