Chen Qihao's typical math problem 660 not only covers the exam outline, but also integrates the whole knowledge system. It is especially suitable for candidates with tight time and heavy preparation tasks, and can systematically master all knowledge points in a short time.

Chen Qihao's typical 660 math problems for postgraduate entrance examination are all selected from important literature at home and abroad, with strong concepts and skills, which can enable students to master the basic calculation methods needed for postgraduate entrance examination, expand students' thinking and make students draw inferences.