Wun Yiu is the only kiln site that produced porcelain in underglaze blue currently found in Hong Kong. Since the 1950s, scholars began to study the history of Wun Yiu. With respect to the historical significance of the kiln site, part of the area where kiln’s remains discovered was declared as monument in 1983.
In 1995 and 1999, the former Regional Council and the Institute of Chinese Studies of The Chinese University of Hong Kong formed an archaeological team to conduct archaeological investigations at the kiln sites. With the generous assistance rendered by the local villagers of Sheung Wun Yiu and Ha Wun Yiu villages, remains of the kiln site, which illustrate the various stages of porcelain producing from quarrying to kiln firing, were unearthed. The study of the early industrial history of Hong Kong, the history of Tai Po, as well as the private kilns in Guangdong province.