The ruins of the Imperial City of the Minyue Kingdom were an important site of the Minyue Kingdom during the Han Dynasty. Characteristic bronze arrowheads unearthed from the East Gate, with their exquisite craftsmanship, provide important physical evidence for studying ancient bronze casting technology and the military activities of that time. However, there is still a lack of systematic research on the alloy composition, casting process, and chemical stability of these arrowheads in long-term burial environments. The bronze arrowheads that were found in the East Gate warehouse are the subject of this study. Metallographic analysis, scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were used to carefully examine their composition and microstructure, as well as the casting process characteristics. The findings reveal the following: (1) The East Gate bronze arrowheads primarily consist of copper–tin binary alloys, and certain samples exhibit a lead (Pb) content of up to 11.19%, potentially due to element addition during casting or element migration in the burial environment. (2) The metallographic structure shows that the sample matrix has a typical α-dendrite structure, indicating that a high-temperature casting process was used, and then a certain surface treatment was performed to enhance corrosion resistance. (3) Under a scanning electron microscope, it was observed that a three-layer structure was formed on the surface of the arrowhead, including a fully mineralized layer, an intermediate transition layer, and the original core tissue. (4) The detection of molybdenum (Mo) in some samples suggests a close relationship between the complexity of the buried soil environment and human activities. (5) By comparing the microstructure and corrosion degree of the longitudinal section and the cross-section, it was found that the longitudinal section has a stronger corrosion resistance due to its denser structure. Comprehensive analysis shows that the technical details of the bronze arrowheads unearthed from the Minyue Imperial City in terms of material selection, casting process, and later use reflect the outstanding achievements of the Minyue Kingdom in the field of bronze manufacturing in the Han Dynasty.

This study investigates the material properties, metallurgical processes, and corrosion mechanisms of bronze arrowheads excavated from the Imperial City of the Minyue Kingdom, a UNESCO World Heritage site in Wuyishan, Fujian, China. Using optical microscopy, SEM-EDS, XRF, XRD, and Raman spectroscopy, the researchers analyzed the cross-section and corrosion layers of the artifacts. Results show that the arrowheads are Cu-Sn-Pb alloys, with Cu (70.76%), Sn (8.73%), and Pb (8.72%), optimizing hardness, toughness, and casting performance. Corrosion analysis reveals a surface layer rich in Cu₂O, CuO, SnO₂, and Cu₂(OH)₂CO₃, driven by oxidation, carbonation, and sulfidation reactions. The corrosion layer exhibits stratification, porosity, and cracks, indicating the influence of oxygen, carbonate ions, and sulfides in burial environments. This study provides crucial insights into ancient bronze metallurgy and the long-term preservation of cultural relics.

Wuyi Mountain in China is listed on the World Natural and Cultural Heritage List. With the vigorous development of urban cultural tourism, the sustainable development of heritage sites has become the focus of academic and industry circles, among which the rational use and scientific planning of natural resources have become increasingly prominent. In this context, in-depth research on resource development and protection strategies in the Wuyishan area has important practical significance and theoretical value. Therefore, this paper presents a case study of the tourist tea garden landscape design practice at the Wuyistar Chinese Tea Garden, located in Wuyishan City. This paper underscores the significance of incorporating the site’s existing natural environment resources, particularly its plant resources, into the tea garden landscape design, while adhering to principles within the framework of world heritage. The research method includes extensive field surveys combined with GIS analysis and biodiversity surveys, covering the topography and slope of the tea plantation, current natural resources, statistics on the number of tourists after completion, and the related benefits of local enterprises. These planning concepts are realized through a series of infrastructure measures, which are divided into four angles: restoring mountains and rivers, rereading cultural context, sorting out style and appearance, and improving functions. The design practice is carried out in different areas. Simultaneously, the creation of a distinctive tourist destination enables tourists to fully engage with nature and tea culture, while simultaneously fostering the growth of cultural tourism in world heritage sites. This study proposes a planning practice case, which provides a framework and ideas for designing tea gardens. From the aspects of resource protection and utilization, cultural inheritance and display, and tourism service improvement, it provides a model and method that can be used as a reference for the landscape design and planning of similar tea gardens, which will help promote the healthy development of the Chinese tea culture tourism industry. It also provides useful practical experience for the protection and development of world heritage sites.