Liu Yifei's diet method is a specific diet plan with a five-day cycle, which mainly achieves the effect of losing weight by controlling the types and portions of food. During these five days, breakfast usually includes boiled eggs, cucumbers, tomatoes and fruits, providing enough nutrition and energy for the body.

Lunch is mainly chicken breast, boiled eggs, vegetable salad and fruit, which increases the intake of protein and dietary fiber. For dinner, she chooses tofu, vegetables and fruits to ensure that she gets enough protein and vitamins. Liu Yifei's diet also emphasizes the balance and diversity of diet, and cooperates with proper exercise to achieve the best weight loss effect.