I think filial piety is much better than gold and silver jewelry. Old people don't have to ask you to buy him anything expensive, but also let you remember her and don't ignore them, so they will be very uncomfortable. Even if you just come back for dinner, they will be very happy. It has nothing to do with giving gifts or not. They don't ask you to buy them anything, just hope you can work and live happily in peace. As long as you live well, they won't care about anything else.