This paper introduces Nishimura Masanari’s research on the Lung Khe Citadel, which was built in the second century CE and continuously occupied until the end of the fifth or early sixth century. Nishimura explored four main topics. First, based on the large-scale bronze workshop in the citadel, he argued that the casting of the bronze drum there had a political purpose. Second, he proved that the Lung Khe Citadel was Long Bien, not Luy Lau. Third, he discovered several types of artifacts, including a table-shaped stone mortar ( pesani ) and kendi that show cultural affinity with artifacts found in Tra Kieu and Oc Eo. Hence, the cross-regional Nanhai trade and political power at Lung Khe might have reciprocally stimulated each other. Finally, Nishimura advanced the far-reaching hypothesis that the prosperity of Chinese Buddhism might have stemmed from the Lung Khe area, on the basis of his study of roof tile ends with mask or lotus petal motifs.

中文翻译：

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西村正成博士对龙溪城堡的研究简介

本文介绍了西村正成对龙K城堡的研究，该城堡建于公元二世纪，一直持续到五世纪或六世纪初。西村探讨了四个主要主题。首先，他基于在城堡中的大型青铜车间，他认为在那里铸造青铜鼓具有政治目的。其次，他证明了龙溪城堡是龙边，而不是刘德华。第三，他发现了几种文物，包括桌上形的石臼（pesani）和肯迪（kendi），它们与Tra Kieu和Oc Eo中的文物具有文化上的亲和力。因此，龙河的跨区域南海贸易和政治力量可能相互促进。最后，