Wu Yunshan was born in Guangxu period of Qing Dynasty. Wu Yunshan, also known as Wu Lian, is nicknamed Shungen. Wu Yungen, the younger brother of Zisha seven old, studied pot art with his brother since childhood. He was a famous purple sand artist from the late Qing Dynasty to the liberation period.

Its masterpiece is the teapot made of cloud mountain and fog. The teapot made by Yunshan Wu is simple and simple, with straight mouth and beautiful curve, which has high artistic value.

Zisha Pot is a unique handmade clay handicraft in China. Its production began in Zhengde period of Ming Dynasty, and the raw material was purple mud, which was produced in Dingshu Town, Yixing, Jiangsu Province. The teapot is bullish in the auction market and is an "antique" with collection value. The works of famous artists are often hard to find. As the saying goes, "There are many jewels in the world, and Yixing Zisha is the most sought after."

The raw material is purple sand, which is produced in Dingshu Town, Yixing, Jiangsu Province, also known as Yixing Zisha Pot. It is said that the founder of teapot is Gong Chun of Ming Dynasty in China. Due to the perfect combination of artistry and practicality, the teapot is so precious and memorable. The benefits of making tea in teapot and the culture of drinking tea blindly add to the noble and elegant charm of purple sand.

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Teapots are used to make tea. It has long been concluded that the performance of teapot is "color, fragrance and taste". Moreover, scientific institutions have made detailed tests on the problem of "staying up late in summer", comparing sand pots with ceramics, and it has indeed proved that sand pots are much superior to ceramics. This conclusion is based on the uniqueness of purple sand raw materials. The teapot is practical, because of its high porosity, which makes it have the advantage of good permeability.

According to the 394th page of History of Du Tao in China, purple clay is characterized by high iron content and a large amount of aggregate in its microstructure. There are two kinds of pores, one is the pores inside the aggregate, the other is the pores around the aggregate, and most of them are open pores. The good permeability of purple clay may be related to this special microstructure.

According to the determination of physical and chemical properties of various clays by Yixing Ceramic Company, it is found that the porosity of purple clay is as high as 10%. Therefore, it shows that good air permeability is of course the main reason for "rich color, fragrance and taste of tea" and "staying up late in summer".

The good plasticity and bonding ability of purple sand mud are the reasons why it is beneficial to craft decoration. Moreover, the firing temperature range of purple sand is very wide, from 1 190℃ to 1270℃, which is another reason why purple sand products are watertight and not aging, and the more they are used, the more shiny they become. All the above shows that this kind of purple sand soil mixed with fine sandy sandstone is the best clay for making pottery pots and a unique treasure in Yixing, Tao Dou.