The "high-quality drinking water" Falk mentioned naturally comes from the ever-growing "Lake of the Ocean" beneath the Wildfire Territory.
In the letter Barbara wrote to her family, she emphasized repeatedly that it is crucial to win over Andrew.
On the other hand, she specifically introduced the drinking water resources of the Wildfire Territory!
As for where Andrew managed to get so much quality water, even Barbara didn't know. Only Ivan knew.
What Barbara does know is that the quality of that water definitely doesn't fall short of any top-tier drinking water she had before in Warm Fire City, or even in the Scholar's Fortress of the Magic Guild!
Andrew's plan was to engage in deeper business cooperation with the Warm Fire Commerce Association, using this method to continue implementing the "Fire Extinguishing Upgrade Method," improve his strength, and prepare for the inevitable Second Double Fire War in the future.
