Lin Mu first collected the two types of apples in large mortars that were used to crush herbs. He started by crushing the normal attribute less Immortal apples and turned them into a juicy pulp.
With Lin Mu's strength, crushing the apples was the same as tearing off a small feather. He crushed each apple with just a squeeze of his fingers and extracted its juice.
Once the apples were turned into a mush, he flipped the mortar's contents into a muslin cloth and squeezed it further gathering the fine juice into a larger container.
To this, he then added a few shards of Immortal Essence crystals.
Lin Mu had been advised by Xukong to add these as they aided in the growth of the naturally present yeast and promoted the fermentation process. With that done, Lin Mu thoroughly mixed it before adding it all to one of the gourds he had prepared.