Old Master Zhang now knows his own words have no effect. All he can do is to have his son return home to properly accompany his grandson. Otherwise, if the current trend continues, the relationship between father and son will indeed be over. He does not want to see such an outcome. As an old man, he only wishes to see a harmonious family; that would give his heart some solace. He does not want on his dying day, as he steps into his coffin, to have his son still at odds with his grandson. Such a thought would give him unbearable pain. As an elderly person, he only desires a peaceful later life, not to be repeatedly worn out by these matters. To him, that would be the greatest happiness and the greatest filial piety.