My parents are both the oldest among their siblings. But they got married very late so I am the youngest among all the cousins.
China started one child policy since 1980 and it was more strict in cities than in rural areas. Among all my peers, I don't know anyone who has a sibling unless they're twins. So I didn't really have the idea about siblings when I was a kid. I considered my cousins as siblings.
Many of my cousins are 1-3 years older than me. Their parents gave many used clothing and stuff to my parents. My parents didn't have much income so they were very happy to receive those gifts. But things were not so idea for me. I really disliked those boys' pants which all have an opening in the front. Felt silly.