The Longtougang site, a recently discovered ancient jade-processing workshop from the Western Zhou period (1046-771 BCE) in eastern Fujian Province, provides crucial physical evidence for studying the history of jade craftsmanship in this region. To better understand and investigate the jade production at the Longtougang site and related cultural issues, we used a stereomicroscope to observe and analyze the surface processing marks on the jade artifacts unearthed from the site. The results show that all the jade artifacts from the Longtougang site were plain, and the processing techniques included cutting, drilling, grinding, and polishing. Parallel spiral lines on the inner aperture and outer wall of jade ornaments (ring and Jue) suggest that their production may have followed a continuous mode and indicate that specialized production may have existed at the Longtougang site. The discovery of thinned jade ornaments (ring and Jue) indicates that pre-Qin jade wares in Fujian formed a unique regional style while absorbing external influences. This study provides a new perspective on the production model of the jade handicraft industry in the southeastern coastal region of China during the Western Zhou period and offers important evidence for studying regional cultural exchange and integration.