The image is a photograph of a plaque on a wall that reads "The Development of Iron-smelting Techniques". The plaque is written in black text on a white background. The text is in Chinese and translates to "China is the first country in the world to grasp the pig-iron smelting technique as well as the pioneer of spheroid-graphite iron casting and stack casting techniques. Well-developed iron-smelling regulatory systems took shape in the Han Dynasty. More than 20 iron-melting sites have been found so far in Henan, represented by the Guixing Town of Zhengzhou, Wafangzhou of Nanyang and Zhaxian Village of Wen County."