There’s a Chinese tradition whereby fake paper money is burnt to honor the deceased ancestors. It is believed that by setting this money on fire it will be transferred to the afterworld and hence the dead ancestors will receive it and their afterlives will be improved.
According to my friend’s explanation the money needs to be folded in a specific way and you can either buy the banknotes and fold them yourself or you can buy it pre-folded like this gentleman is offering in his little shop.
But it’s not all about money. You can also send other things into the afterworld by burning them. Like these paper trainers (for sporty ancestors).