Moral values & examples
People should be respectful of their elders. Mr. Lim reminds Ying to show respect to his mother. He himself does things to please her.
2)Traditions should be maintained
Respect to the ancestors must be shown for they will bless the living.
3)Kindness and consideration matter
Ying feels that what she does for her grandmother is more meaningful (she gives blood) than what the second aunt brought for her [burial clothes, pg 31]. Some customs can be painful. Mr. Lim remembers vaguely his mother holding his hand when he was a child while catching crabs. He wishes he had asked her more about that time. That he follows her ritual is his way of showing respect, love and consideration to her
I'll post the themes and synopsis in a while