Diabetes became a major disease in the world. The total number of people diagnosed with diabetes worldwide exceeded 400 million and was still growing. So far，there had been nearly 100 varieties of 12 types of hypoglycemic drugs developed and marketed globally. The international market for hypoglycemic drugs reached over US$70 billion last year，and it was expected the total sales of hypoglycemic drugs in the international pharmaceutical market would reach US$95 billion or more by 2030.