Evaluation of the Clinical Efficacy and Feasibility of Digital Foot Care Intervention Strategies With Different Intensities in the Prevention of Diabetic Foot Ulcers.

Inclusion Criteria: 1. Age ≥ 50 years but \< 80 years; 2. Assessed to meet the criteria for the high-risk population for diabetic foot as defined by the International Working Group on the Diabetic Foot (IWGDF) (risk level 3); 3. Capable of using a smartphone to take photos and operate apps, or able to do so after simple training; 4. Willing to participate in the study and sign an informed consent form. Exclusion Criteria: 1. Currently has an open foot wound or an unresolved foot ulcer; 2. History of major lower limb amputation above the ankle joint; 3. Pregnancy or breastfeeding; 4. Currently suffering from poorly controlled malignant tumors; 5. Receiving glucocorticoid or immunosuppressive therapy; 6. Diagnosed with vascular occlusive vasculitis; 7. Presence of foot fracture; 8. Significant visual impairment affecting image acquisition or operation; 9. Other conditions deemed inappropriate for participation in this study by the research team.