Not less than 10000 words. Lanzhou City University has at least 10000 words and about 20 references. There must be documents related to the research topic in the past three years, and the number of pages of papers, periodicals and dissertations must be indicated. Thesis is a Chinese word, commonly used in classical literature, which means to talk or exchange ideas. Nowadays, papers are often used to refer to articles that conduct 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. Including academic papers, graduation papers, dissertations, scientific papers, achievement papers and so on.