1. Green tea: Green tea is rich in polyphenols, which has antioxidant and hypoglycemic effects and is suitable for diabetics.

2. Daylily tea: Daylily contains a substance called anthocyanin, which can help lower blood sugar and cholesterol levels and has a certain adjuvant therapeutic effect on diabetic patients.

3. Barley tea: Barley tea contains a substance called β-glucan, which can help lower blood sugar levels and has certain benefits for diabetic patients.

4. Chrysanthemum tea: Chrysanthemum is rich in flavonoids, which helps to protect islet cells and promote insulin secretion, and has a certain auxiliary therapeutic effect on diabetic patients.

In a word, diabetic patients should choose tea with less sugar and caffeine, pay attention to controlling the amount of drinking, and combine drug treatment with scientific diet for management.