According to information, 70% of the world's zinc currently comes from mined zinc ore, while 30% originates from recycled or secondary zinc. With advances in zinc production and zinc recovery technology, 80% of recoverable zinc is now recovered and zinc can be recovered at all stages of production and use. At the same time, with the development of industrial technology, zinc is being produced in a wider variety of products. The specific product that we would like to introduce is related to zinc and it is GI. In this article we will give a brief introduction and analysis of GI.