After becoming a mother, a filmmaker uncovers the untold history of China's one-child policy and the generations of parents and children forever shaped by this social experiment.After becoming a mother, a filmmaker uncovers the untold history of China's one-child policy and the generations of parents and children forever shaped by this social experiment.After becoming a mother, a filmmaker uncovers the untold history of China's one-child policy and the generations of parents and children forever shaped by this social experiment.