What important link is missing?

"However, Wan'er couldn't bear to eat them, so she saved them for grandpa and grandma and mom and dad. Grandpa and grandma, mom and dad work very hard."
Mamie Li's tears fell down.
She picked up Wan'er, put her face close to Wan'er's, and said, "It is said that children from poor families grow up early, and this is absolutely true."
"Ah, Wan'er must have gone through so much hardship and suffering in the past to become so sensible."
"Wan'er's father is really a jerk. No matter how...