Classification of oral hypoglycemic drugs, including: 1. drugs of the biguanide class, representative drugs include metformin, metformin extended-release tablets, which can reduce the output of liver glucose to achieve the effect of lowering blood sugar. 2. drugs of the sulfonylurea class, representative drugs include gliclazide, glimepiride, glipizide, etc. 3. drugs using alpha-glucosidase inhibitors, representative drugs include acarbose, voglibose, etc. 4, Drugs of glargine class, representative drugs are Repaglinide. 5. DPP-4 inhibitors, representative drugs are Saxagliptin, Vigliptin, Sitagliptin and other drugs. 6. GLP-1 analogues, representative drugs are Liraglutide, Exenatide and so on.