Do I need to buy a patent for wine production formula to open a wine factory, or ...

Wine production does not need special formula, because its raw materials are only high-quality wine grapes, yeast, sulfur dioxide and other bactericidal agents, and later filtration requires bentonite and other filtering agents. The brewing process itself is not complicated, but it is not easy to brew high-quality wine. First of all, there should be vineyards with good terroir conditions, and raw grapes should be carefully managed to ensure the high quality of raw materials, because good wine is actually grown. Secondly, in the brewing process, if it is a large-scale industrial production mode, it needs a senior brewing team to control the whole brewing process, which will involve professional Saccharomyces cerevisiae. However, this commercial Saccharomyces cerevisiae is relatively easy to find in China. Then there are various professional preparations to remove impurities in the whole brewing process, which are actually not difficult to find supply channels. As for the so-called production formula, most of them refer to the blending ratio, which changes every year according to the quality of grapes, but single variety brewing usually does not involve this link, unless it is a high-end wine, even a single variety, it will usually be blended according to the original wine flavor of different vineyards, but this is the work of the brewing team. If it's just a factory, food industrial production license will do. But without a good vineyard as the foundation, no matter how good the factory is, it will not produce good wine, and it will eventually become a processing link in the industrial chain. It is better to import raw wine directly and can it.