This is a prospective, randomized, open-label, controlled clinical study. 1500 subjects with Type 2 DM will be enrolled and be randomized into Structured Education Group and Conventional Education Group in 1:1 ratio. Subjects in both of the groups will be treated with Scilin®M30 twice daily (30 minutes before breakfast and dinner). All the previous oral antidiabetic drugs (OAD(s)) will be discontinued except metformin and alpha-Glucosidase Inhibitors. The physician will determine the starting dose (0.3 IU/kg～0.4IU/kg), as well as later changes to dose according to insulin titration algorithm. The treatment duration will last 16 weeks.