It means: at home, filial piety is a loving parent. If the child is at home, parents should call us and answer it as soon as they hear it. Don't delay. When parents ask us to do something, we should do it quickly, don't procrastinate, don't delay, and don't be too lazy to do it. When parents teach us to study hard, just as they teach us how to be a man, we must listen respectfully and keep what we hear in mind. If our children do something wrong, when parents blame and discipline us, we should obey their parents' blame and discipline, and bear the losses caused by doing something wrong, and we should not disobey our parents and make them sad and dissatisfied.
Before learning the teachings of sages, I felt that I was very filial to my parents, knew how to love my parents, and never did anything that worried my parents. After learning Disciple Rules, I reflected that filial piety seems easy to observe, but in fact, I haven't done well enough. I often ask myself, although my parents are gone now, in retrospect, there are still many places where I have not done enough and filial piety. Sometimes I don't listen to my parents' questions carefully, and sometimes I often talk to my parents in an impatient tone. In retrospect, I really regret my ignorance. Parents don't care about the length of their children, but it's really wrong to be a filial son.