Nine families. Guizhou takes eleven subjects and requires nine subjects to pass. They are Chinese, maths, English, geography, biology, history, politics, physics, chemistry, general and computer. Among them, nine subjects are above grade C, and you can get a diploma. The exam is divided into four grades: A, B, C and D. Those who pass C or above can get a high school diploma and take the college entrance examination. People who graduated from high school are eligible to take the college entrance examination.