The Book of Phosphorus Factory
There is a factory in a certain town, which is called a phosphorus factory. Its land is good at the benefits of mountains and rivers, and it is rich in phosphorus ore, so the factory is set up here to make phosphoric acid.

Everything in the factory is regulated. All workers are diligent in their duties, and each is responsible for their own responsibilities. Those who extract phosphorus go into deep mountain mines, wear stars and wear the moon, and dig up phosphorus stone. It is very laborious. The stone is taken out, transported to the factory, and through various processes, calcined, leached, refined, and then obtained phosphorus acid.

The establishment of the factory is quite beneficial in the city. To make a living for everyone, many people in the city are employed here, and the family is gradually prosperous. And the phosphoric acid it produces is sold in all directions, increasing the wealth of the city, and also promoting the prosperity of industry and commerce.

However, there are also worries about the factory. Its industry is related to chemical industry, or pollution. Waste gas goes into the air, or the sky is obscured; waste water is bet, or rivers are polluted. The factory owner also noticed this disadvantage and sought a good strategy. He wanted to make the workers beneficial and not harmful to the environment. Then he purchased state-of-the-art equipment, carried out a clean process, and hoped to protect the beauty of mountains and rivers, and restore the clarity of nature.

Everyone works together, and the phosphorus factory is thriving day by day. At both ends of the profit and environmental protection, we all strive to make progress together, in order to achieve long-term prosperity and be the foundation of the well-being of