Fishing in rivers, lakes and seas, with fresh air, abundant sunshine and low noise, is a good health care environment. There is plenty of oxygen in the seaside air of rivers and lakes, and breathing fresh air often can cause various corresponding good physiological reactions of human body; The air contains a large number of negatively charged macromolecules-negative ions, which can produce negative ion effect after being inhaled into the human body, and can combine with hemoglobin and positive ions such as potassium, sodium and magnesium in the body, so that the oxygen in the blood increases, and people will feel more comfortable and energetic. Coupled with the positive and optimistic attitude of fishermen, it is strange that they will not live long!