Although the onset of cerebral infarction is sudden and the changes are rapid, some omens can often be found in the minutes, hours or days before the onset of the disease if observed carefully. The main abnormalities are as follows: 1. sudden numbness and weakness of limbs, or epileptic-like convulsions; 2. blurred vision, deafness and tinnitus; 3. slurred speech or incomprehension of others’ words, sometimes not recognizing one’s loved ones; 4. confusion or drowsiness; 5. headache and vertigo, accompanied by nausea and vomiting. These symptoms last for a short time, and some may recover quickly without leaving any trace. Many people are under-recognized and even have a fluke, thinking that they may get better after resting at home. However, these early abnormal signs may take a sharp turn and symptoms such as crooked mouth and dizziness, confusion, headache and vomiting may appear, at which time a good time to go to the hospital has been missed Cerebral infarction, i.e. blockage of blood vessels in the brain, thus causing the corresponding brain tissues supplied by the blood vessels to begin to lack blood and oxygen. From the start of ischemia and hypoxia to irreversible necrosis of brain tissue, this period is only 3-6 hours short and fleeting, which is the critical period for the failure of cerebral infarction treatment. During this time, the damaged brain tissue may still be saved if it is effectively treated. Once the time is long, the brain tissue is irreversibly damaged after necrosis and softening occurs. Clinically, many patients miss this valuable treatment time Our ancestors called acute cerebrovascular diseases such as cerebral infarction and cerebral hemorrhage “stroke”, which is a major killer that seriously endangers human health. Statistics show that with the aging of society and changes in people’s diet and lifestyle, the incidence of stroke will gradually increase, with a tendency for the age of first onset to be lower. Statistics also show that the high mortality rate and disability rate of stroke bring heavy economic and mental burden to the family of each stroke patient. Studies have shown that thrombolytic therapy is the best treatment for eligible patients with emergency cerebral infarction, and if a patient with cerebral infarction is diagnosed quickly and thrombolytic therapy is implemented as soon as possible, most patients will recover and tragedies such as disability and death will be avoided. To successfully seize this precious treatment time, we must promptly detect and identify the various symptoms of cerebral infarction in the early stage of its onset, and quickly transport the patient to a hospital with treatment capability.