Molecular Communication (MC) is a bio-inspired paradigm that uses molecules as information carriers for nanoscale information exchange, with significant potential in healthcare, environmental monitoring, and synthetic biology. It also plays a key role in enabling the Internet of Bio-Nano Things (IoBNT) for real-time health monitoring, precise diagnostics, and targeted drug delivery. However, MC faces considerable challenges across theoretical, experimental, and system-level dimensions. Theoretically, its limited transmission range, low data rates, and delays caused by molecular diffusion hinder real-time communication, while molecular noise and environmental interference further weaken reliability. Experimentally, the complexity of simulating biological environments and molecular channels, as well as challenges in molecule synthesis and detection, limit the scope of existing platforms. At the system level, integrating MC with 6G/7G networks requires robust cross-scale communication solutions, efficient molecular-electromagnetic signal translation, and secure data management, while also addressing privacy concerns. Overcoming these challenges demands interdisciplinary collaboration, bringing together experts from medicine, chemistry, nanotechnology, and engineering. This workshop serves as a platform for researchers, engineers, and practitioners to exchange ideas, explore innovative solutions, and advance the practical applications of MC.