Back to the North: After 30 years of one child family policy, Chinese parents who experience the death of their only son or daughter are becoming what is called "lost families."This has become a poignant issue, as there are more than one million "lost families" right now. Xiao Ai is diagnosed with a terminal illness and does not have long to live. She is concerned that her parents will become a "lost family" and have no one to take care of them after her death, so she decides to persuade them to have another child...