Environmental problems are becoming more and more serious all over the world. Here it is also serious in China. The government has taken series of actions to protect the environment from 2017 such as forbid the poisonous gas to give off by factories, forbid waste water to pour into rivers... So the production cost of manufacturer are increasing these years. Also, the cost of our boron oxide are increasing now. In addition, the raw material of boron oxide is increasing now becuase every cost such as the salary, water charges, electricity charges, gas charges, housing prices are much higher than before.