l, encounter the accident to calm, do not panic, should call for help, while trying to save themselves. 2, when swimming cramps, if very close to the shore, should immediately out of the water, to the shore for massage; if far from the shore, you can take the backward swimming posture, floating on the surface of the water as far as possible to the cramped limb traction, massage, in order to relieve; if self-rescue does not work, should try to use the limb not cramped paddling against the shore. Wang Xudong of the emergency department of the central aerospace hospital 3, swimming encounter water grass, should be backstroke stance from the original way to swim back. In case you get entangled in the water plants, don’t jump around, you should float on the water surface. Paddle with one hand, untangle the water plants with the other hand, and then swim backwards from the original way. 4, swimming into the whirlpool, you can breathe in and dive underwater, and swim hard outward, to swim out of the center of the whirlpool and then surfaced. 5, when swimming, if there is physical exhaustion, excessive fatigue, should stop swimming, back floating on the surface of the water to restore physical strength, to return to shore in time after physical recovery. Water rescue If you are in the water, always remember to use a life jacket or other floating objects, hypothermia or drowning will quickly appear, you must act quickly, other items such as ice buckets can be used as a temporary float, if the injured draught too much water can not breathe, tilt their head back, pinch the nose, move the mouth deep breath two, if it does not work, try again, “cough out, cough out “. Rehabilitation position Can smooth the injured person’s airway – lean the body to the left, put the right leg forward, and lean the head on the left arm. Helps to spit out water that has been ingested. If you are searching for a casualty in the water, you should have a reference point to make sure you don’t get lost. Life is unpredictable, as in these situations, danger can arise in an instant and safety must come first.