章 75: Chapter 75: Making the Best Use of Everything

The pickling jar in winter, ah," Qi Younian and Nanny Jin both showed a sudden look of realization; they of course understood this. But...

Qi Younian asked, "What does pickling vegetables have to do with your frozen dessert?"

Ah, Ye Xinyan saw their look of realization and thought they understood, but it turned out that they were just remembering that the pickling jars in winter didn't freeze over.

She continued to explain, exerting herself, "The ice is mixed with salt, and even though the ice melts, the brine remains very cold, with a freezing point low enough to solidify the milk custard. Such a salt solution is like the winter environment, cold enough to freeze the milk custard in the small bucket."

Yexinyan spread her hands and said, "It's that simple, we just never thought of it before."

Forgive her limited ability to explain, as to what extent Grandfather and Nanny Jin could understand, it was beyond her control as someone who had only received standard physical education.