Finally, there is one who was also 农村插队 in Beijing.

I was in 顺义张喜庄. The place where I took the tests is 4 miles away. I forgot how I got there. My village had around 80 知青. 3 people got 通知书. As soon as I got my 通知书, I thought something was wrong since they changed what I wanted to study.But it works out for me. No regret.