Hi! I am Zaiyi Chen. I received my Ph.D degree in Computer Science from University of Science and Technology of China(USTC) in 2019. My advisor is Enhong Chen, and my co-advisor is Linli Xu. I joint Prof. Tianbao Yang's group as a visiting scholar, working on first-order stochastic optimization, from Oct. 2016 to Oct. 2017. Recently, I joined Cainiao AI as a machine learning researcher. I focus on large-scale first-order method in ML and applicable OR methods in logistics.