The treatment period is composed of a 24-week double-blind period (week 1-24) and a 28-week open-label period (week 25-52). During the double-blind period, participants will receive 10 mg or 25 mg dose of HSK7653, or linagliptin, and with matching placebo respectively. During the open-label period, all participants will receive 25 mg dose of HSK7653. All participants will receive a stable dose of metformin therapy in both the double-blind period and the open-label period.
The purpose of this study is to assess the efficacy of HSK7653 (as an add-on to metformin) compared with linagliptin after 24 weeks, and the safety (up to 52 weeks) of HSK7653 in Chinese patients with Type 2 Diabetes who have inadequate glycemic control on diet/exercise therapy and metformin agent monotherapy.