Yu Jingchen still laughed, thinking there's no need to confess to his grandmother about doing such things. "Grandma, isn't it about time for your afternoon nap?"
"What time do you think it is? How can I nap now!" Grandma Yu pointed at the clock; it was already past two.
Yu Jingchen began explaining with a bunch of scientific reasoning. "Grandma, the proper time for an afternoon nap should be an hour after lunch. If you sleep right after eating, it seriously affects your digestive function. See, we have lunch at 12, finish around 12:30, then you have to eat some fruits. After that you take some medication, and at this point, you need to drink water. If you calculate, your last meal was also past one, and now is just an hour after; this is the best time for a nap. Once you're up, you can have dinner, right?"
Grandma Yu glared at her eldest grandson; clearly, he was just rambling nonsense.