How to make a fire passbook

The steps of making a fire passbook are as follows:

1, the sweet potato vine is soaked in water;

2. Take it out and flatten it;

3. Soak cotton and reed tassels before beating;

4, drying in the sun, adding flammable substances such as nitrate, sulfur, rosin, camphor and various spices;

5. Fold it into a long flat tube or twist it into a rope, light it like a fire in a bamboo tube at night, and take it out and burn it immediately when you use it.