Phosphorus
There are strange things in the world, called phosphoric acid (Phosphorous Acid Cas). It is unique in nature and widely used.

Looking at its shape and quality, the color is pure and the state is different. Either it is crystal clear, just like ice on a cold day; or it is liquid clear, like jade pot nectar. Its taste is astringent and pungent, but it feels strong when touched.

There are various methods for making phosphoric acid. Or it is based on ore, calcined and extracted, and its essence is analyzed; or it is derived from other things, and it is transformed by chemical changes. All this depends on the wisdom of skilled craftsmanship and the ability of craftsmen to make strange things appear in the world.

As for its use, it is very precious. In the industry of agricultural mulberry, it can be used as an agent to fertilize the soil. Applied to the field, it can fertilize the soil, help the seedlings of grain and millet, and promote their roots to be fruitful, the fruit is abundant, and the year is good. In the field of industry, it also has special achievements. It is a raw material for pharmaceuticals, a good medicine for all kinds of diseases, and a cure for human diseases; it is an auxiliary for making utensils, making utensils firm and used for a long time.

However, although this thing is beneficial to the world, it should not be careless. Its nature is corrosive, and a little lax will hurt people's skin and destroy the quality of things. Therefore, those who use it must abide by the rules and be prepared for preventive equipment, so that they can be protected.

Phosphoric acid is a rare thing. It benefits the country and the people, and it has great merit. Only by making good use of it can we do our best to benefit the common people.