I am from Guiyang, too. I graduated last year. The passing line in the math exam is different every year. It is the last 5% (probably), but it is impossible to pass the last level every year. However, the lowest score in our class seems to be 60. That's enough. Everyone can pass major subjects such as math without too bad. Don't worry, what bald middle schools are there in No.2 Middle School? The landlord only needs to pass 60.