据有关专家考证,我国瓦当最早出现于西周中晚期至春秋战国时期,期间多为兽面纹饰。西汉时期则盛行文字瓦当,如“未央”、“长乐”、“上林”等,也有吉语瓦当,如“延年益寿”、“长乐无极”等。这方洮河绿石砚,不但借鉴了汉铜雀台瓦当形铜砚的砚堂制式,而且将兽面纹与文字瓦当的特点浇铸一身,从而更显 According to the relevant experts research, China’s Wadang first appeared in the late Western Zhou Dynasty to the Spring and Autumn Period, during which mostly animal facial decoration. The Western Han Dynasty is the prevalence of text Wadang, such as “Wei Yang ”, “Changle ”, “Shanglin ” and so on, there are auspicious Vatan, such as “longevity ”, “Changle Promise ” and so on. This side of the river Green Shek Yan, not only draws on the Chinese bronze bird Watanabe Tong Yan Tang Tong Yan standard system, but also the animal face pattern and character tile as one of the characteristics of casting, which is even more significant