. >> little jiahe is an only child. he holds the most precious place in the household, with parents and grandparents catering to his every whim... and documenting his every move. >> "i am constantly writing to my son, telling him my thoughts and feelings in micro-blogs or postcards, which he will see in the future. i'm writing down the problems i have encountered and the way i have found to tackle them in the hope that they will be useful to my son when he grows up." >> jiahe and his parents are typical of the three-person nuclear family that has emerged in china in the last three decades, a result of the country's controversial family planning practice - commonly called the one-child policy. he yin and her husband lin zhongjie know just how it feels to be single children. they both grew up in one-child households, and they wonder if that's the best environment for their son. "one obvious feature of our generation is a strong sense of loneliness... most of us were growing grew up without the company of siblings or cousi