All participants of the Diabesity Register will receive structured assessment by nurses guided by the JADE portal at baseline including eye, feet, blood and urine examination with evaluation of BMI, blood pressure, HbA1c, lipid profile, renal and liver function tests, urine for albumin-creatinine ratio. All patients will return at 3-year for a repeat assessment of physical and psychological health, as well as changes over time.

Inclusion Criteria:

1. Type 2 diabetes;
2. Obesity reaching action level as defined as body mass index (BMI) 27.5 kg/m2 and/or waist circumference (WC) 80cm in women and 90cm in men;
3. Age between 18 and 50 years;
4. Able to conversate with smartphone technology and web-based program.
5. Able to read Chinese and communicate using Chinese.

Exclusion Criteria:

1. Type 1 diabetes;
2. Active malignant disease including those with history of malignant disease less than 5 years of disease-free duration;
3. Life expectancy less than 12 months;
4. Any medical illness or condition as judged by the investigators as ineligible to participate the study.

All study subjects will be recruited from the Diabetes Mellitus and Endocrine Centre (DMEC) at PWH. Since 1995, the PWH runs a comprehensive complication screening program as part of a quality improvement program in the DMEC. On a weekly basis, patients with diabetes mellitus undergo comprehensive assessments for risk factors and complications by nurses and health care assistants using standard protocols.