Dr. Yuzhu Cui obtained her Ph.D. from the National Astronomical Observatory of Japan (NAOJ)  and is currently a researcher at Central China Normal University. Her research interests include active galactic nuclei, relativistic jets, supermassive black holes, and VLBI observations. She has led long-term EAVN monitoring of M87 and studies of black hole–jet coupling. Her representative works on M87 jet precession and black hole–disk–jet dynamics  were published in Nature and Nature Astronomy. She is also an active member of the EHT Collaboration and currently serves as a coordinator of its Multi-Wavelength Working Group.Supermassive black holes launch relativistic jets that extend from event-horizon scales to hundreds of kiloparsecs, yet the physical connection between black hole spin, accretion flow, and jet evolution across these vastly different scales remains poorly understood. In this talk, I will present recent observational progress on the nearby radio galaxy M87 using long-term very long baseline interferometry (VLBI) monitoring observations. Using more than two decades of multi-frequency VLBI data from the East Asian VLBI Network (EAVN) and VLBA, we discovered a quasi-periodic evolution of the M87 jet position angle, suggesting long-term precession of the jet-launching system. Combined with new 86 GHz VLBI observations and recent horizon-scale EHT results, these findings support a dynamically evolving black hole–accretion disk–jet system in M87. I will discuss the implications for Lense–Thirring precession, jet collimation, and the coupling between the black hole spin and accretion flow.