What information do we learn about Ha's father in the end of the book? *

A letter arrives from Ha’s father’s brother, who has not been able to find out anything about Ha’s father. The New Year is very difficult on the family as a result. Ha’s mother loses her amethyst ring at work. It cannot be found anywhere. Mother takes this as a sign that her husband is truly gone. The family holds a mourning ceremony for him and decides to move on.