Mrs. Zhen's return was not well-timed; the next day was Monday, so Zhen Yu had no choice but to honestly attend five days of classes.
Grandma also stayed at the Zhen family's house for five days, sitting on the kang (a traditional heated bed) when leaving in the morning, and still sitting there when she came back at night, as if she hadn't moved at all.
One could guess that aside from using the bathroom and eating, she really just sat there the whole time, watching TV.
Mrs. Zhen reopened her shop on Monday, after all, she had been away for five days, and closing the business for that long was enough; she had to earn money to have something to eat and drink.
Every morning before leaving, Mrs. Zhen would seal Grandma's lunch in a big pot; since there was always a fire in the stove, the lid could be opened at any time to have a hot meal.
Mrs. Zhen thought life would just continue like this, even though her children didn't voice any objections, which she found quite surprising.