Actually, the principle of the sprayer isn't too complicated. Jiang Xinyu understood Feifei's explanation.
"Mom, I still have a lot of herbicide here, but how do I bring it out?" Although her mother already knew she wasn't normal, saying it so blatantly still made her a bit scared. Even self-deception requires a fig leaf.
"I'll think of a way for this. Can we keep up the supply?"
Feifei understood what her mother was asking. "Yes, I have almost no food here, just chemicals."
Jiang Feifei had reincarnated, so she had no psychological burden in calling Jiang Xinyu 'Mom.'
The reason she could reveal her biggest secret was because she knew this young mom was just like her.
"Alright, I understand. I can think of what materials to use for the sprayer now."
"What can we use? This is what bothers me the most."
