A Research Study, Looking at How Tresiba® Works in People With Type 2 Diabetes in Local Clinical Practice in China

Inclusion Criteria: * Signed informed consent Form (ICF) obtained before any study-related activities. Study related activities are any procedures that are carried out as part of the study, including activities to determine suitability for the study. * Male or female, aged at least 18 years at the time of signing the ICF. * Diagnosed with T2D. * Treated with any OAD(s) or basal insulin ± OAD(s), with or without prandial insulin for at least 20 weeks prior to treatment initiation with Tresiba®. * The decision to initiate treatment with commercially available Tresiba® has been made by the patient/Legally Acceptable Representative (LAR) and the treating physician before and independently from the decision to include the patient in this study. * Treated with Tresiba® (with or without OADs, with or without prandial insulin) for at least 20 weeks and have at least one documented medical visit with HbA1c measurement in the first 20 weeks (plus/minus 8 weeks) after Tresiba® initiation. The patient may or may not be treated with Tresiba® at the time of patient selection to this study. * Minimum available data: age, weight, and sex at the time of Tresiba® initiation, HbA1c (most recent value within 12 weeks prior to Tresiba® initiation and a value in the first 20 weeks \[plus/minus 8 weeks\] after Tresiba® treatment), and duration and type of insulin treatment (for insulin treated patients). Exclusion Criteria: * Previous participation in this study. Participation is defined as having signed the ICF. * Participation (defined as randomisation) in a diabetes clinical trial of an approved or non-approved investigational medicinal product within 20 weeks prior to the treatment initiation with Tresiba® or during the first 28 weeks of treatment with Tresiba®. * Tresiba® not used in accordance with the local label. * Patients treated with continuous subcutaneous insulin infusion or premix insulin in the 20 weeks prior to receiving Tresiba® (short-term \[equal to or less than 14 days\] treatment with continuous subcutaneous insulin infusion or premix insulin in the 20 weeks prior to receiving Tresiba® is allowed). * Mental incapacity, unwillingness or language barriers precluding adequate understanding or cooperation.