i always wondered how it would be like to be an only child, someone with no siblings
You must have brothers, sisters, or both! Which means you are VERY lucky! What appeals to you? 
all throughout history only children are actually not common i have one brother
Is your brother older or younger? I have two younger sisters, so I rarely had to share stuff or worry about competing with them. But I did take care for them!
i have younger brother, how old are your siblings? i can't imagine living in china where the one child policy was implemented
One is 2 years younger, the other 6 years. Yay, the one child rule in China seems repressive. Do you know anyone who lived or lives in China? I doubt those policies would ever be implemented in the USA.
i don't but one thing interesting about it is that more than one child was allowed for ethnic minorities
What about other (contemporary) countries? Do you know of any with similar policies?