[thaumasiotes]

There is a Chinese holiday, Qingming ( https://en.wikipedia.org/wiki/Qingming_Festival ), devoted to caring for ancestors' graves. Obviously, there is heavy cemetery traffic on that day.

The major ritual involves burning (fake) money for the deceased to use in the afterlife, but food offerings are also made. The food is not burned - it is recovered and eaten by normal living people, though I don't know whether people eat in the cemetery.

The general idea of bringing food to the cemetery so that a dead relative can be part of the meal too, though, seems fairly natural to me. When you want to spend time with a dead person, where would you go to do that?

[secondaryacct]

They do eat there, here in Hong Kong it's even funny: people dont go all at the same time and end up putting their trash on other people's grave, making the entire cemetary a mess on the day.

Weirdly, they also are absolutely insanely paranoid about have a view of the cemetary from their appartment: I know me and my wife lived in one such (cheap as a consequence) flat, and her parents were quite mad. When we left, the owner was trying to sell it, but all couples would just stop at the view, pause, and nope as fast as possible :D

I'm trying to get a suicidee or murderee flat for cheap but my wife is absolutely against still.

[HKH2]

I remember someone telling me that they put a mirror facing the window to reflect the [negative energy] away.

[bashmelek]

I find the idea very natural too, and there is precedent for this in Western tradition as well. In the times of ancient Rome, people would eat a meal with at their gravesite of a dead relative. This meal was called "refrigerium". https://en.wikipedia.org/wiki/Refrigerium

Interestingly enough, some necropoleis in those times were literal cities of the dead, made of structures with rooms where the dead were interred, and people could do the regrigerium in those "houses". https://en.wikipedia.org/wiki/Necropolis mentions this style of necropolis for the Etruscans, but it is my understanding Rome had these too at some point.