If foot odor is converted into Qi, it will lose its corrosive properties, which would result in more energy, as Qi is a greenhouse gas like carbon dioxide, and its insulating capability is inherently strong.
However, Barefoot Immortal wants to use foot odor, which has strong corrosive properties and is highly flammable and explosive, so the choice of material for the balloons is crucial.
It must be able to resist the corrosive action of foot odor, and the thickness must be sufficient, ideally using spacesuit material, as it is durable enough.
But where can such balloons be bought?
Barefoot Immortal first went to the vegetable market and found the old man selling balloons. Today, the old man was pushing a bicycle with a bunch of balloons tied to it, of various ridiculous shapes. Barefoot Immortal immediately spotted a horse-shaped balloon among them.
