We are soliciting submissions to the doctoral colloquium (DC) for ChinaVis 2019. The doctoral colloquium is an academic exchange platform for Ph.D. students to facilitate feedback from leading senior visualization researchers. At the colloquium, Ph.D. students will present their proposed dissertation work, discuss the validity of their problem and the efficacy of their approach with expert researchers, and receive helpful feedback and fresh perspectives on their research topics and possible career paths. The colloquium will provide the opportunity for students to interact closely with expert researchers in their field. The colloquium welcomes Ph.D. students who are in the process of formulating their dissertation topic or who have just formulated a dissertation topic. This is an invitation-only event, and the expert panelists will be invited according to the research direction of accepted applicants.