"Tiangong Kaiwu" is a comprehensive work on agricultural and handicraft production written by Song Yingxing in the Ming Dynasty, which may involve various substances. With "Chemical Formula For Potassium Ferrocyanide (the chemical formula of potassium ferrocyanide) " as the core and direction, the creation of a classical Chinese is as follows:

There are many types of substances in the world, each with its own nature and formula. In today's words, potassium ferrocyanide has the formula $K_4 [Fe (CN) _6] $. This substance has different properties and a wide range of uses.

In the field of Guanfu Chemical Industry, potassium ferrocyanide is often the key to the production of materials. It may have the power of Sasuke in metallurgy; in the dyeing and weaving industry, or as a color enhancer. Although it is hidden among all things, its use should not be underestimated.

Potassium ferrocyanide, the color may be different, or it may be light and transparent, or it may have a different color. Its shape may be powder, delicate like dust, or crystalline, clear like jade. It is easily soluble in water, and may have a slight blue when dissolved, and its liquid is clear to see.

And potassium ferrocyanide often shows unique changes in various reactions. When other things touch, or the color of the product is different, or there is a change in shape, it is all due to the interaction of the elements in its formula.

Although potassium ferrocyanide is difficult to see in daily life, it is important to ignore the prosperity of industry and the progress of scientific research. The formula $K_4 [Fe (CN) _6] $, like the key to open the door, leads people to explore the mystery of matter and the mystery of chemistry.