There are at most 7749 days after death, and some are less than this time. It would be a pity if you haven't been reborn after the pubic body stage. You have fallen into a ghost road. Burning paper money is of some use to ghost Dao, but it can't solve his fundamental problem. It is best to turn back or cross.

As for grave-sweeping, memorial service and other activities, remembering the old friend is the virtue of the Chinese nation, which is of course beneficial to the living and educates future generations not to forget their ancestors. It doesn't mean much to the dead If the dead have been reborn, the fate is over, and you can't receive the paper money you burned.