You can eat a small amount of fruits and medicines, and don't eat fireworks except boiled water and medicines.

2. Intermediate fasting:

Just drink water or a little juice, honey and other drinks.

3. High water content:

Don't eat any food or drink water, but you need someone to protect you.

Beginners can start at a short and low level. With the improvement of persuasion and the accumulation of experience, they can gradually extend the time and improve the level of breaking the valley.