What is the topic that Dong Linwei chose? From scientific practice! Dong Linwei gave a special lecture on "Declaration and Scheme Design of Educational Research Topics" to the students of Jiangsu Expert Teacher Development Training Course "Teaching the Sea and Exploring Navigation" in the way of "cloud teaching", which mainly focused on five aspects: what is educational research, why do educational research, how to choose a topic, how to design a scheme and how to declare it.