How to produce HJT Solar cells?

https://www.huasunsolar.com/how-big-is-a-utility-scale-solar-project.html

Compared to those solar cell manufacturing that have more than 10 steps of processing, HJT cells only need 4 steps, all at low temperatures. The streamlined hjt solar cell process flow effectively reduces production costs and carbon emissions and is more in line with the needs of the "dual carbon" target. Today, we will decrypt the key steps in the production of HJT cells.