Why does Lanzhou hookah spray wine?

Lanzhou hookah spraying wine is because it can effectively reduce the harm of smoking. Lanzhou hookah is a famous specialty in northwest China, which once played an important role in the economic development history of Lanzhou. When smoking Lanzhou hookah, the block cut tobacco is soaked in white wine or clear water, kneaded into small balls and put into the pipe, and half a bottle of water is stored in the cigarette bottle. When smoking, negative pressure is formed in the upper space, and the smoke passes through the water surface and makes a purring sound. When inhaled, smoke is filtered by water, which can effectively reduce the harm of smoking. Therefore, Lanzhou hookah should spray wine.