Natural Zisha Stone Yellow Clay "Lanting Xu" Cup Size approx: Height 6.8cm / Width 8.3cm Capacity approx: 220ml Weight approx: 274g; Origin: Yixing City, Jiangsu Province, China Material: Natural Zisha Stone Yellow Clay Craftsmanship: Fully handmade / Electric firing (The entire text of Lanting Xu is hand-carved on the cup body) "Lanting Xu" was written by the calligrapher Wang Xizhi of the Eastern Jin Dynasty in China and is known as the "Number One Running Script Under Heaven," representing the achievements of Jin Dynasty calligraphy. "Lanting Ji Xu" consists of a total of 324 characters, with no two characters being the same. The 21 "之" characters within it each have a unique charm and are not identical. Zisha Stone Yellow Clay is a rare soft clay produced from the Yixing Zisha ore layer. It is rich in iron, several times that of ordinary Zisha clay, resulting in a deep color after firing. It has a high shrinkage rate and extremely low plasticity, making it very difficult to shape. After firing, it exhibits a deep color, high iron content, improves the taste of tea, and has strong water-softening capabilities. It is known as "black gold in the earth," with extremely high manufacturing difficulty and low yield, but it achieves an excellent patina effect after being seasoned with use. Yixing Zisha is a unique mineral resource in China, also known as "five-color earth," hidden deep within the hillsides as natural pottery clay. Zisha teaware has enjoyed a high reputation for thousands of years and has unique advantages when brewing tea. Zisha is rich in natural iron, which is beneficial for health, and is resistant to acid, alkali, and high temperatures. Long-term use of Zisha can avoid excessive intake of harmful metals such as aluminum ions, which affect human health. Zisha has a dense texture with fine pores and good breathability that does not allow water to penetrate. The natural iron in Zisha has a resolving effect on fat. Scientific experiments have proven that purified water, when boiled in a Zisha pot, becomes weakly alkaline with a PH value around 7.1 after mineralization, which is conducive to forming a weakly alkaline healthy body constitution. Some trace elements in Zisha can also activate the decomposition of lipase. ■ The color of the photo may differ slightly from the actual product due to the shooting environment. Immediate purchase is welcome. Thank you.