80 points for undergraduate thesis is actually quite easy to get. It's not that you can get 80 points by fooling around, but that 80 points is actually very easy if you do it seriously, and the requirements of ordinary universities for graduation thesis are not so strict. You just need to master your own format and content, and as long as you can roughly justify yourself, this has reached the point of 60 points. And for most schools, 70 points and 80 points are the main score intervals, which means that the whole class can basically have more than 70%, reaching more than 70 points. So 80 points is basically a popular score, even if your school is strict, it is still a medium score.