2. After all, it is the world of Yin and Yang, because the current technology cannot communicate with each other. Your so-called filial piety and missing your loved ones are all a kind of imprisonment. Just like today's families, some old people don't want to live with their children, but because their children's enthusiasm for filial piety is hard to resist, they can only compromise. If there is a soul, you won't let it rest in peace. You can understand whether it is filial piety or unfilial.