Liu Xiao Di and the single child policy
The single child policy was introduced to help stop the fast growth of China's population. Xiao Di's family are part of China's rich middle class and their ambitions and attitudes are similar to those of Western families - they want him to be happy, to have friends, to do well at school and to be healthy. Unlike their own generation, they don't want him to be duty-bound to caring for them in their old age. Having a single child has allowed them to devote more time to him, but they feel that having brothers or sisters would benefit Xiao Di, both socially and emotionally.