With the aggravating trend of aging and the improvement of people's living standards, the proportion of patients with diabetes shows an increasing trend. A considerable number of existing therapies need daily self-injection of insulin and other drugs to maintain their own blood sugar stability. However, this also presents an important issue, the patient injection practices and individual differences will lead to their own hypoglycemia. It can even be life-threatening when the symptoms are severe. Recently, a researcher from the University of Toronto in Canada developed a new device designed to eliminate this problem. The device looks like a dermal patch with a micro-injector attached to it to detect blood glucose levels in real-time. When the blood glucose level is too low, the device can automatically deliver glucose or other hormonal drugs to the patient quickly Regulate blood sugar. The researchers said the device can solve the problem of hours of hypoglycemia in diabetics before they could be adjusted to normal levels. In addition, the device can monitor the patient's diet or exercise blood sugar fluctuations play a supervisory role and thus greatly improve the quality of life of patients. Hypoglycemia refers to an adult whose fasting plasma glucose concentration is less than 2.8 mmol / L. Diabetes patients with blood glucose ≤ 3.9 mmol / L to diagnose hypoglycemia. Hypoglycemia is a syndrome caused by a variety of causes of venous plasma glucose (referred to as blood glucose) concentration is too low, the clinical sympathetic nerve stimulation and brain cell hypoxia as the main feature of the syndrome. Symptoms of hypoglycemia are usually manifested as sweating, hunger, flustered, trembling, pale, severe cases, there may be confusion, agitation, irritability and even coma and so on. Currently, the diabetes market has become one of the largest disease markets in the world. In 2014, there were 420 million confirmed diabetic patients in the world and 590 million undiagnosed patients. The total number of people with diabetes is projected to rise to 1.5 billion by 2035. In 2015, 5 million people died of diabetes worldwide, and the global diabetes treatment expenditure reached 673 billion U.S. dollars, accounting for 12% of the total global medical expenditure. The global diabetes drug market in 2015 reached 51 billion U.S. dollars and the figure is expected to reach 116.1 billion U.S. dollars by 2023. China is one of the countries with the highest incidence of diabetes. According to statistics, 11.6% of adults have diabetes and the total number of patients reaches 110 million. In China, 13% of medical expenses are devoted to diabetes treatment, with an annual expenditure of 25 billion U.S. dollars. Expected 2030 diabetes medical spending will reach 47 billion US dollars.