Personal resume: Yang Zhengchun, male, born in January 1978, graduated from Guizhou Medical University with a master's degree in medicine. He started work in July 2004, and is currently a deputy chief physician and a member of the Chongqing Association of Ultrasound in Medicine and Engineering. 

Medical treatment field and expertise: He has been engaged in ultrasound diagnosis for 12 years and has extensive clinical experience in the diagnosis of adult cardiovascular and breast diseases and fetal malformation screening.
Participation topics, published papers and monographs: He has hosted or participated in two projects and published more than 10 papers, including four CSCD core papers.