We have applied for a patent, but how to mass-produce?

Did you apply for a patent yourself? If so, it is possible to carry out quantitative production according to the method described in the patent. If another person has applied for a patent, it has made and used it by itself before the other person applied for it, and it continues within the original scope, which does not constitute infringement. Can continue mass production. Note that you have started mass production before others apply, and if it is later, it will constitute infringement.