The eight-legged essay, said to have caused China's subsequent stagnation
en.wikipedia.org
en.wikipedia.org
I nearly failed it, and apparently I'm far from the only one[1]. If you didn't follow the format, more like filling out a form than actual writing, then you didn't get the full points, no matter how well it was written by more subjective standards.
That wasn't the only problem, but it was certainly one. They ditched the test because a lot of people were failing it.
[1] https://www.washingtonpost.com/archive/politics/1986/01/23/m...