**About the Editor**

**Li Li**

Li Li (Full Professor) is a registered engineer in Ordre des Ingenieurs du Qu ´ ebec (OIQ). He ´ obtained a bachelor's degree and a master's degree, both in mining engineering, in China and a doctorate degree in France. Dr. Li has been working in geotechnical engineering for about 25 years in both academia and the industry. He was an Associate Professor at Ecole de Technologie Sup ´ erieure ´ (ETS) between 2010 and 2012. He was Associate Professor between 2012 and 2018 and became a ´ Full Professor in 2018 at Polytechnique Montreal. Dr Li is interested in several fields in geotechnical ´ engineering (rock, soil, and backfill mechanics). He is particularly active in research for estimating pressures and stresses in backfilled stopes, sizing barricades made of waste rocks, and assessing the required strength of side- or base-exposed backfill. He believes that a professor of engineering at the university level has several roles. As a researcher, he believes that improving our knowledge and improving the reliability of what we do have the same importance as originality and novelty. Simplification and step-by-step studies are his favorite methodologies in research. Any well-founded achievement or improvement should not be underrated. As engineers, we need to know what the value and application of our projects are in the industry. Our solutions and designs need to take into account the influencing factors as much as possible if it is impossible for all factors to be considered.
