The "4-2-1 Problem", an effect of China's One Child Policy which meant that a single child was left taking care of both of his parents and all four of his grandparents. In response, a new policy was implemented which allowed a couple to have two children if both parents were already only children

The "4-2-1 Problem", an effect of China's One Child Policy which meant that a single child was left taking care of both of his parents and all four of his grandparents. In response, a new policy was implemented which allowed a couple to have two children if both parents were already only children