A method for the production of retinal cells, useful in transplantation therapy, comprises: obtaining one or more mammalian adult M\xfcller cells; and culturing the cells in the presence of an extracellular matrix protein and a growth factor to thereby induce dedifferentiation of the M\xfcller cells into a progenitor phenotype. The process of the present disclosure includes performing pretreatment on fresh burdock, protecting color, pre-drying by RF, drying through microwave pulse spouting, and packaging. The detected embouchure and breath pressure are then modified with reference to a recommended embouchure and breath pressure weighted by a given assistance coefficient. By breaking the anneal into two steps, smaller semiconductor nanowires at a tight pitch survive the process and yield.