Under the framework of the “Comprehensive Research on East Asia Tectonic Evolution (CREATE)” project, the seismic research subproject has deployed a broadband seismic array with 25 stations and a high-density linear array across the Red River Fault Zone in northern Vietnam since 2005. These observations aim to image and interpret the crust and mantle structures in northern Vietnam, reconstruct the geodynamic evolution of the Red River Fault Zone, and assess seismic hazards in the region. Since the deployment of these arrays, a substantial number of local, regional, and teleseismic events have been recorded. By analyzing seismic data spanning diverse epicentral distances and azimuths, researchers have gained critical insights into deep seismic structures and regional tectonic evolution. Looking ahead, these stations are expected to be upgraded for real-time data transmission, enhancing earthquake monitoring, seismic hazard assessment, and tsunami early warning systems in the South China Sea (named also the East Vietnam Sea). Over the past two decades, the project has yielded significant scientific achievements and published 16 scientific papers. More importantly, it has fostered strong collaboration between Vietnamese and Taiwanese scientists. Many graduate students involved in the project have pursued careers in research institutions and universities, while several key researchers have advanced to leadership roles in scientific organizations in both countries, further contributing to the broader scientific community.