C436 It Was a Piece of Cake

Lin Yu was taken aback by their remarks. If purifying the water was that simple, their problems would be solved. Yet, they expected him to teach them how to purify it, a task far from easy.

He had relied on a computer to cleanse the water, investing considerable effort. Expending so much energy was hardly ideal.

"I'd like to teach you, but it's not something that can be taught. Besides