Two of the seven elective subjects are history, geography, physics, chemistry, biology, technology and politics. According to official website of Anhui Education Bureau, AB card refers to two other non-liberal arts comprehensive subjects besides Chinese and mathematics in Anhui College Entrance Examination. In 20021,2022, and 2023, the subjects of AB card in the general college entrance examination in Anhui Province are two of the seven optional subjects, such as history, geography, physics, chemistry, biology, technology, and politics, that is, in addition to compulsory Chinese and mathematics, candidates need to choose two of the seven optional subjects to take the exam.