The 9th International Conference on Railway Operations Modelling and Analysis (RailBeijing 2021) will be held in Beijing, China, on November 3rd-7th, 2021. Due to COVID-19 it will be a hybrid conference with both online and onsite participants. Details about the exact format will be released later. The deadline for paper submission has been extended to May 8, 2021. Both authors of research papers and professional papers are invited to submit their paper. For full details, see the conference website www.railbeijing2021.com