Chen Pengyu and Han Yanyan of Zunyi Medical College are better than Chen Pengyu. Chen Pengyu, party member of the Communist Party of China, Ph.D., tutor of master's degree, director of master's degree in forensic medicine, and judicial appraiser. 20 13 graduated from Sichuan university majoring in forensic medicine, and then worked in Zunyi medical college, mainly responsible for the teaching and scientific research of forensic material evidence. He presided over the completion of the National Natural Science Foundation 1 item and the doctoral start-up fund 1 item. Three graduate students were trained, and more than 20 SCI papers were published in international professional journals as the first author or correspondent. Han Yanyan mainly undertakes the teaching work of Zunyi Medical College and has not published any important papers, so Chen Pengyu and Han Yanyan of Zunyi Medical College are better than Chen Pengyu.