We invite submissions for the Doctoral Colloquium (DC) at ChinaVis 2023, which provides an academic forum for Ph.D. students to obtain feedback from senior researchers in the field of visualization. During the colloquium, Ph.D. students will present their proposed dissertation work, discuss the soundness of their research problem and approach with expert researchers, and receive constructive feedback and novel perspectives on their research topics and potential career trajectories. The colloquium also affords an opportunity for students to closely interact with established researchers in their area of study. It is open to Ph.D. students who are in the process of formulating or have recently formulated a dissertation topic. The selection of expert panelists will align with the research interests of the accepted applicants.