Strict. The Beijing Municipal Education Commission is very strict in sampling test papers, in order to strengthen and improve the supervision, evaluation and monitoring of education, ensure the basic quality of undergraduate talent training, and achieve full coverage of professional degree, part-time, equivalent students and international students. Papers are often used to refer to articles that carry out research in various academic fields and describe academic research results, which are referred to as papers for short. It is not only a means to discuss problems in academic research, but also a tool to describe academic research results in academic exchanges.