Professor Zhang Zhengcheng has been engaged in scientific research on the theory of system reliability and applied stochastic processes, mainly focusing on studying conditional order statistics, conditional spacings, and the ordered properties of load-sharing systems. The relevant results have been recognized by domestic and foreign scholars and have been published in international journals. He was an (associate) professor of Lanzhou Jiaotong University in China from 2009 to 2018, and have been a professor in HaiNan Normal University since 2019. Moreover, he visited William Q. Meeker, a distinguished professor at Iowa State University from August 2011 to December 2011, and distinguished professor N.Balakrishnan at McMaster University,from November 2012 to December 2013. And he has been doing collaborative research with them in reliability and statistics.