Securities Times e company news, Yinglian shares recently stated during institutional research that the company's PP composite copper foil has recently been sent to some top customers for sample testing, and the customer-side bond strength test results have been highly evaluated, showing certain advantages. Further testing and feedback from customers are still needed, and the sample work for other customers will continue. Currently, the company's composite copper foil product yield is about 85%, and the company is still committed to continuously improving the yield. The production capacity of composite copper foil has not yet been achieved, and the estimated cost after achieving mass production in the future is 3.5 yuan/square meter.