In this era, there's not much in terms of entertainment activities.
Not every household can afford a color television.
The Fu Family can't even bring themselves to install an electric light, living such a hard life; naturally, a TV, such high-end stuff, is out of the question.
Every evening, as soon as it gets dark, the elder Fu couple just light a kerosene lamp and sit in the house for a heart-to-heart conversation.
They'd chat about some things that happened in the village recently.
Just some trivial household gossip, like whose wife was caught having an affair with whom and got beaten up.
Or perhaps someone's old hen in the house went missing, and so on.
Mundane matters can be talked about for half the night, just to pass the time.
As for how Jiang Xin, knows about these things?
It's entirely due to the poor insulation of the old Fu house, making the original resident almost forced to listen daily to Fu Yu's parents discussing these topics.