What is the meaning of' brewing' in Zuiwengting's "Brewing Springs for Wine"?

You can't open it here, because the brewing spring mentioned earlier is a noun: "Walking six or seven miles in the mountains, you gradually hear the sound of water bubbling between the two peaks, which is also a brewing spring."

In this case, we can't directly ask what brewing here means, but we can only say that brewing spring water is to make wine with brewed spring water.

From the above, the so-called brewing spring should refer to the spring water that can make wine. So, in fact, brewing is brewing.